Trademark Assignment Due-Diligence Checklist: Validating Chain of Title

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Before you wire money for a brand, you have to prove the seller actually owns it—cleanly, completely, and in a way a court and the USPTO will both recognize. This checklist walks buyers, lenders, licensees, and their counsel through trademark assignment due diligence in phases: scoping the deal and inventorying every property, pulling the official USPTO, WIPO, TTAB, and court records, reconstructing the chain of title link by link, and then stress-testing each link for the defects that quietly void transfers. It explains the two killers that turn a recorded assignment into a worthless one—the assignment in gross and the intent-to-use anti-trafficking rule—plus the encumbrances (security interests, exclusive licenses, co-existence agreements) and the substantive threats (abandonment, naked licensing, genericide, audit exposure) that can hollow out a mark with perfect paper title. Each phase carries plain-English WHY notes, Trap warnings, controlling authority, and worked examples with invented brands. A remediation phase shows how to map findings to deal-killers, price adjustments, closing conditions, reps and warranties, and a post-closing recordation plan that beats the three-month bona fide purchaser window. Verify current USPTO and WIPO procedures and fees before relying on anything here.

Intellectual Property -> Trademark | Published 28 June 2026 | rightsy.io

You can record a flawless deed to a house that the seller does not own. The county clerk will stamp it, file it, and hand you back a beautiful certified copy—and you will still own nothing, because the clerk does not check title; the clerk checks paperwork. Trademark recordation works exactly the same way. The United States Patent and Trademark Office records the assignment you hand it without ever deciding whether the assignment is valid, whether the seller actually owned the mark, or whether some defect three owners back quietly voided the whole chain. The regulation says so in as many words: recordation "is not a determination by the Office of the validity of the document." 37 C.F.R. § 3.54.

That single fact is why due diligence exists. The job of a trademark assignment is to move a living, distinctive, unencumbered asset from a seller who genuinely owns it to a buyer who will genuinely use it—and to do so in a way that survives a later attack by a competitor, a licensee, a lender, a bankruptcy trustee, or opposing counsel in litigation. The job of due diligence is to find out, before the money moves, whether that is actually what is happening. It is the difference between buying a brand and buying a lawsuit.

This checklist is the buyer's-side companion to our assignment recordation checklist. That one tells you how to paper and record a transfer you are making. This one tells you how to vet what you are about to receive: how to reconstruct a mark's ownership history from the original applicant to the present claimed owner, find every gap, test every link for the defects that void transfers, hunt down the encumbrances that ride along invisibly, and confirm that the asset under all that paper is alive, used, and worth what you are paying. Work it start to finish and you will know—not hope—that the mark you buy is the mark you actually get.

What this checklist is for, who should use it, and what you'll need

What it is for. Validating chain of title—the unbroken sequence of ownership from the mark's first owner to the party now claiming to own it—and confirming that the rights underneath that title are valid, enforceable, alive, and unencumbered. It covers federal registrations and applications on the Principal and Supplemental Registers, pending intent-to-use applications, Madrid Protocol extensions of protection, and unregistered common-law marks.

Who should use it. The buyer of a brand or a single mark; an acquirer running intellectual-property diligence in a merger or asset deal; a lender taking a mark as collateral; a prospective exclusive licensee whose investment depends on the licensor's title; a franchisor or franchisee; and the trademark counsel advising any of them. Sellers benefit too: running this checklist on yourself before you go to market is the cheapest way to surface and cure problems while you still control the timeline.

What you'll need before you start.

A note on scale. A single-mark purchase might take an afternoon. A portfolio of two hundred properties spanning forty countries is a project with a budget and a team. Scale the depth of each phase to the materiality of the deal, but never skip a phase entirely; the cheapest mark in the portfolio is often the one carrying the lien.

The one question all of this answers

Strip away the procedure and every phase below serves a single inquiry: Does the seller own a valid, living, unencumbered mark with the priority it claims—and can you prove it to a skeptical third party?

Unpack that and you get the five things diligence must establish, which map onto the phases that follow:

  1. Title — an unbroken chain of ownership from the original applicant to the seller, with no missing links and no entity-name mismatches (Phases 1–2).
  2. Validity of each transfer — every link in that chain carried goodwill, satisfied the intent-to-use rules, was properly executed by an authorized signer, and (where it mattered) was timely recorded (Phase 3).
  3. Freedom from encumbrances — no security interest, exclusive license, co-existence agreement, or pending proceeding that survives the sale and binds you (Phase 4).
  4. A living, enforceable asset — the mark is maintained, genuinely used, not abandoned, not generic, not hollowed out by naked licensing, and actually as strong as the price assumes (Phase 5).
  5. A clean path to close — the defects you found are graded, allocated by contract, and cured by closing conditions and a post-closing recordation plan (Phase 7), with the special structures handled (Phase 6).

Keep that question taped to your monitor. Every checkbox is in service of being able to answer it "yes," in writing, with citations.

Why does the proof matter as much as the fact? Because a broken chain of title is not merely an administrative blemish—it can defeat your standing to sue. In Federal Treasury Enterprise Sojuzplodoimport v. SPI Spirits Ltd., 726 F.3d 62 (2d Cir. 2013), the famous STOLICHNAYA vodka fight, the Second Circuit held that the party trying to enforce the mark could not establish that it held the registrant's rights through a valid chain and therefore lacked standing to sue under § 32 of the Lanham Act. The lesson is brutal and clarifying: you can have a real grievance against a real infringer and lose at the courthouse door because you cannot prove you own what you say you own. Diligence is how you make sure that never happens to be you.

Phase 0 — Scope the diligence and build the file

Five minutes of framing here saves five months of confusion later. Before pulling a single record, decide what you are looking at and build the container to hold what you find.

WHY. Most diligence failures are scoping failures. The team believes it is buying one registered word mark and discovers at closing a portfolio containing two unused ITU applications, a Madrid extension, and a co-branded logo whose copyright belongs to a freelance designer who was never paid. You cannot validate a chain you never knew existed. Inventory first; analyze second.

Trap. The seller's own IP schedule is a starting point, not gospel. Schedules are drafted by people in a hurry; they miss pending applications, list marks under informal names, and omit the lapsed registration that still appears in the public record and still clouds title. Rebuild the inventory from the official register, then reconcile it against the seller's schedule—and treat every discrepancy as a question, not a typo.

Phase 1 — Pull every official record

You are now an archivist. Before judgment comes collection: assemble the complete, authoritative paper trail for each property from the systems of record, not from the seller's data room.

WHY. The systems of record are the only sources a court, a future buyer, or the USPTO's own renewal machinery will trust. The seller's narrative ("we've owned this since 2015, clean as a whistle") is a hypothesis to be tested against the record, not a finding. Pull the primary sources yourself; do not outsource your knowledge to the counterparty.

Trap — the cover sheet is not the conveyance. The Assignment Search summary is generated from the cover sheet (37 C.F.R. § 3.31) the filer typed in, which can be wrong, incomplete, or aspirational. The legally operative document is the recorded instrument attached behind it. A cover sheet that says "assignment, including goodwill" tells you nothing if the attached deed never mentions goodwill. Always open the actual document.

For a fast, structured way to retrieve a registration's recorded assignment history and reconstruct who held the mark when, you can run chain-of-title lookups in Rightsy's assignment records and cross-check live status before you ever build the chain by hand. And because an accurate owner of record is what everyone downstream relies on, the same data that powers a clearance search done right is the data you are auditing here.

Phase 2 — Reconstruct the chain of title, link by link

Now you build the spine of the whole exercise: a documented, gap-free ownership history for each property. Treat it like a genealogy. Every owner is a generation; every transfer is a birth certificate; a missing certificate is a problem you must solve before you can claim descent.

WHY. Gaps and name mismatches are the single most common—and most curable—chain-of-title defects, and they cause damage out of all proportion to how boring they sound. They cloud title, they let an opponent challenge your standing (recall Sojuzplodoimport), they cause the USPTO to balk when a maintenance filing arrives from an entity that does not match the record, and they let a buyer discount your price. A clean, documented chain is worth real money precisely because so few sellers can produce one on demand.

Trap — the entity-name shuffle that hides a real assignment. Companies reorganize constantly: drop-downs, holding-company formations, F-reorganizations, division spin-outs. Each one can move a mark to a different legal entity while the brand on the door never changes. The seller experiences this as "we've always owned it"; the register experiences it as an unrecorded assignment. Treat every entity-name change as a transfer to be proven, not a cosmetic update to be waved through.

Worked example. Meridian Brands is buying the home-textiles brand Lantern & Loom. Counsel pulls the record and builds the chain: the LANTERN & LOOM word mark was registered in 2016 to "Dana Whitfield, an individual"; the seller is "Lantern & Loom Holdings LLC." Between those two names the register shows nothing. The seller explains, plausibly, that Whitfield incorporated in 2017 and the business has run through the LLC ever since—but the 2017 transfer from founder to company was never papered or recorded. That is a missing link at a load-bearing point in the chain, and it must be cured with a confirmatory assignment (Phase 7) before Meridian can take clean title. Found in diligence, it is a two-page fix. Found in litigation three years later, it is a standing motion.

Phase 3 — Stress-test each link for validity

A chain can be complete on its face and still be broken, because a transfer can be recorded and yet void. This is the analytical heart of the checklist. For every link you mapped in Phase 2, run the validity tests below. A single void link taints everything downstream of it.

3A. Did goodwill ride along? (The assignment-in-gross test.)

WHY. Section 10 of the Lanham Act provides that a mark "shall be assignable with the good will of the business in which the mark is used, or with that part of the good will of the business connected with the use of and symbolized by the mark." 15 U.S.C. § 1060(a)(1). A transfer of the bare mark without its goodwill is an assignment in gross, and courts treat it as a legal nullity. Marshak v. Green, 746 F.2d 927, 929 (2d Cir. 1984) ("There are no rights in a trademark alone . . . no rights can be transferred apart from the business with which the mark has been associated."); United Drug Co. v. Theodore Rectanus Co., 248 U.S. 90, 97 (1918). The reassuring part is that goodwill does not require hauling away factories: an assignment is valid without any transfer of tangible assets "provided the assignee is producing a product or performing a service substantially similar to that of the assignor." Sugar Busters, L.L.C. v. Brennan, 177 F.3d 258, 265 (5th Cir. 1999); accord Berni v. Int'l Gourmet Rests. of Am., Inc., 838 F.2d 642, 646 (2d Cir. 1988). Where the buyer slapped the mark on unrelated goods, the assignment fails. PepsiCo, Inc. v. Grapette Co., 416 F.2d 285 (8th Cir. 1969).

Trap. The magic words "together with the goodwill" are necessary but not sufficient. Courts look through the recital to reality, and a buyer who recites goodwill but plans to use the mark on something wholly different gets no protection from the language. Conversely, a sloppy instrument that omits the recital is not automatically fatal if the surrounding transaction plainly moved the business—but you do not want your title resting on a court's willingness to imply goodwill. In diligence, grade a missing-goodwill recital as a defect to cure with a confirmatory assignment, and grade a mark-on-different-goods history as a possible void link.

The deeper your diligence here, the more it shades into valuing the asset itself: a mark that began life as merely descriptive is only as strong as the secondary meaning it has acquired, so confirm the goodwill you are paying for actually exists. See how descriptive marks acquire secondary meaning and, for the buyer's evidentiary view, establishing secondary meaning: a Section 2(f) evidence checklist.

3B. Did any link move an unused intent-to-use application? (The anti-trafficking test.)

WHY. Section 1060(a)(1) bars assignment of an intent-to-use application before use begins, "except for an assignment to a successor to the business of the applicant, or portion thereof, to which the mark pertains, if that business is ongoing and existing." Congress wrote this to stop trafficking in reserved-but-unused names. Violate it and the assignment is void—and so is any registration that issues from the application. The TTAB polices the line by asking whether the assignee was a genuine business successor or merely a buyer of a naked application. Central Garden & Pet Co. v. Doskocil Mfg. Co., 108 USPQ2d 1134 (TTAB 2013). The mechanics of why an ITU is so fragile in a deal are laid out in intent-to-use applications: claiming a trademark before you sell, and the use-proof step that cures the fragility is in filing the statement of use: a checklist for ITU applicants.

Trap. This defect hides in old links, not just the present deal. A registration the seller has held and used cleanly for years can still be void if, back when it was an unused ITU, it was sold naked in some long-forgotten reorganization. Use cures nothing retroactively here: a transfer void under § 1060(a)(1) does not become valid because the buyer later used the mark. Trace the ITU history of every registration to its origin, and grade an improper historical ITU assignment as a root-level validity problem.

Worked example. Two years before Meridian's deal, Lantern & Loom filed an ITU for a new line, LANTERN & LOOM HEARTH (Class 24), and—before any Statement of Use—assigned just that application to a newly formed shell, "L&L Hearth LLC," that had no employees, customers, or operations, as part of a tax-planning maneuver. No business moved; only the application did. That assignment is void, and the registration that issued from it is vulnerable to cancellation as void ab initio. Meridian should treat the HEARTH registration as impaired, carve it out of the core valuation, and either price it at near zero or condition closing on the seller resolving it.

3C. Were the formalities satisfied?

WHY. Formality defects are quiet but real. A transfer signed by someone without authority, or executed only as a handshake, can be challenged years later by the entity that supposedly conveyed the mark—or by its bankruptcy trustee. The writing requirement (§ 1060(a)(3)) and the acknowledgment benefit are cheap protections the careful chain will already have; their absence is a flag.

Trap — the vague schedule. Omnibus IP assignments in M&A love the phrase "all intellectual property of the Company." Courts will sometimes honor that, but a specific mark that appears on no schedule, in no exhibit, and in no recorded instrument is a mark you cannot confidently say moved. In diligence, match each property to a specific line in a specific executed instrument. If you cannot, you have found a gap dressed up as a transfer.

3D. Was recording timely—and does the timing protect you?

WHY. Section 1060(a)(4) is a real-property recording act for brands: "An assignment shall be void against any subsequent purchaser for valuable consideration without notice, unless the prescribed information reporting the assignment is recorded in the [USPTO] within 3 months after the date of the assignment or prior to the subsequent purchase." A seller who quietly conveyed the mark to someone else before you, who did not record, may still be beaten by you if you record first—but the same rule means you can be beaten if you sit on your paperwork. Recording timing is not housekeeping; it is priority.

Trap. Do not confuse recording with validating. Recording an assignment in gross does not cure it; the USPTO records ministerially and "is not a determination . . . of the validity of the document." 37 C.F.R. § 3.54. A pristine recorded chain over a void link is still a broken chain. Recording protects you against later good-faith purchasers; it does nothing against a prior defect.

Phase 4 — Hunt for encumbrances and competing claims

A mark can have perfect title and still arrive shackled. Encumbrances are the claims that survive the sale and bind you: liens, licenses, agreements, and proceedings. They rarely volunteer themselves; you have to hunt.

WHY — perfection lives in the UCC, not the USPTO. The single most expensive encumbrance mistake is assuming the USPTO assignment record shows all the liens. It does not. A security interest in a trademark is perfected under UCC Article 9—by filing a UCC-1 with the appropriate Secretary of State—not by recording at the USPTO. In re Roman Cleanser Co., 802 F.2d 207 (6th Cir. 1986). Recording a security agreement at the USPTO gives notice and is good practice, but a careful lender perfects under the UCC, which means a perfected lien can exist with no trace in the assignment history. Run the UCC search, or buy the mark with someone else's loan still attached to it.

Trap — the exclusive license that outranks your ownership. An exclusive license granted before your purchase can leave you owning a mark you cannot fully use, because the licensee holds the exclusive field. Worse, exclusivity plus change-of-control or anti-assignment language can let the licensee block or unwind the deal. And in bankruptcy, trademark licenses get their own strange treatment (Phase 6). Read every license; do not assume "we license it out a little" is immaterial.

The license risks here connect straight to two siblings: the trademark licensing agreement checklist on quality control and key terms tells you what a defensible license should contain (so you can judge the ones you are inheriting), and the settlement and coexistence agreement checklist explains the restrictions a co-existence deal can bake into your title. If a live Board proceeding turns up, the TTAB practice toolkit and the petitioner's-side cancellation checklist show you what you are walking into.

Worked example. Meridian's UCC search turns up a financing statement filed by a regional bank against Lantern & Loom Holdings LLC covering "all general intangibles, including trademarks." Nothing about this lien appears in the USPTO assignment record. The bank's loan is still outstanding. If Meridian closes without a payoff and a UCC-3 termination, it buys the flagship mark with a perfected security interest riding on top—and if the seller later defaults, the bank can foreclose on the very mark Meridian thought it owned outright. The fix is a closing condition: payoff letter, lien release, recorded UCC-3.

Phase 5 — Confirm the asset is alive, used, and strong

Clean title to a dead mark is clean title to nothing. This phase checks the asset itself: is the registration maintained, is the mark genuinely used, and is it as strong as the price assumes? These are the substantive killers no chain-of-title trace will reveal.

WHY. The maintenance and substantive rules are catalogued in keeping your registration alive, and every killer there becomes your problem the moment you own the mark. The cruelest version is the naked-license trap: you buy what looks like a clean asset, discover the seller collected royalties from three licensees without ever inspecting a single product, and find yourself defending the mark's very existence against an abandonment claim. Quality control is a duty you inherit, and the cure is operational, not cosmetic—the new owner must actually exercise the control the licenses reserve.

Trap — the registration that is alive on paper and dead in fact. TSDR can show a registration "live" with every maintenance box checked, while the mark has not actually been used in commerce for years because the seller padded its § 8 specimens or coasted on a single SKU. Live status is the floor of your inquiry, not the ceiling. Ask for current, dated proof of genuine use for each material good/service, exactly as an auditor would.

For the deeper evidentiary work these bullets invoke, three siblings pair naturally: proving or defeating trademark abandonment: an evidence checklist for the nonuse and naked-licensing questions, the trademark maintenance and renewal toolkit for the filing posture, and the trademark distinctiveness and protectability toolkit for grading strength from generic to famous. When you are buying a whole brand rather than a single mark, fold this phase into a full portfolio audit.

Worked example. Meridian's flagship LANTERN & LOOM word mark checks out on title—but Phase 5 reveals two soft spots. First, the registration lists eighteen goods in Class 24, and the seller has not sold "bed canopies" or "fabric flags" in years; that deadwood is audit and expungement bait. Second, the year-10 combined § 8/§ 9 filing is due in four months and has not been filed. Neither is a deal-killer, but both become Meridian's responsibility at closing: Meridian conditions the deal on the seller deleting the deadwood and either filing the combined renewal or giving Meridian the authority and runway to file it in the correct (new) owner's name.

Phase 6 — Handle the special structures

Real deals are messier than checklists. Here are the recurring structures that change how you validate title, each with the extra checks it demands.

Mergers and corporate reorganizations

WHY. In a merger the goodwill question usually takes care of itself—the whole business continues in the survivor—but the recording still has to happen, or the next maintenance deadline arrives in the name of an entity that no longer exists. Internal restructurings are the great manufacturer of chain gaps because nobody thinks of them as "transfers."

Bankruptcy-estate sales

Trap. A bankruptcy bargain feels like clean title because a court is involved, but the § 1060(a)(1) ITU bar and the goodwill requirement do not switch off in bankruptcy. Buying a naked ITU "free and clear" still buys you a void application.

Estates, individuals, and death

Foreign assignors and § 66(a) extensions

WHY. A Madrid extension is a creature of the International Register. Record the change only at the USPTO and the international layer still shows the old holder—the exact mismatch you came to prevent, now duplicated across two systems. The eligibility rule is its own trap: a buyer ineligible to hold the international registration may force a restructuring or a fallback to national filings. These mechanics line up with the Madrid Protocol international filing checklist.

Partial assignments and divided registrations

WHY. A clean carve-out depends on getting the underlying goods, services, and Nice classification right, and on anticipating that you and the seller are about to become each other's nearest neighbors on the register.

Security-interest financings (the lender's diligence)

Common-law and unregistered marks

WHY. Unregistered rights are real but bounded; their reach is the reach of the trade plus its natural zone of expansion, as the geography of common-law protection and the common-law rights and geographic scope toolkit explain. Validate both the title and the territory.

Phase 7 — Grade the findings and close the gaps

Diligence that ends in a memo nobody acts on is theater. This phase converts findings into deal terms: grade each issue, allocate it by contract, cure it by closing, and lock in a post-closing recordation plan.

WHY. Curing a missing link is usually a two-page confirmatory assignment reciting the true original effective date—legitimate and routine, so long as you memorialize history honestly rather than fabricate it; a nunc pro tunc deed documents a transfer that actually occurred, it cannot manufacture one that did not. The recordation timing is not optional: the § 1060(a)(4) clock means a later bona fide purchaser can beat you if you sit on the paperwork, so build recordation into the closing checklist with a hard internal deadline well inside ninety days. The full mechanics of papering and recording the cure live in the assignment recordation checklist, and the separate logo-copyright assignment connects to the copyright registration checklist.

Trap — "the paralegal will record it after closing." Recordation deferred is recordation forgotten, and the post-deal chaos is exactly when a competing purchaser's window stays open. Treat recording as a closing deliverable, not a someday task. And remember to confirm the owner of record actually updated on each property afterward; an assignment can be recorded while the registration still displays the old owner, reopening the very gap you closed.

Worked example. Meridian's diligence memo grades the Lantern & Loom deal cleanly. Deal-killers: none. Price/risk adjusters: the deadwood in Class 24 and a moderately crowded field for the word mark—Meridian trims the price modestly. Fixable at closing: (1) the 2017 founder-to-LLC gap, cured by a recorded confirmatory assignment from Dana Whitfield reciting the 2017 effective date; (2) the bank lien, cured by a payoff and recorded UCC-3; (3) the void HEARTH sub-mark, which the seller agrees to abandon and exclude from the deal at no value; and (4) the looming § 8/§ 9, which closing authorizes Meridian to file in its new name. Post-closing, Meridian records its assignment through the Assignment Center within three weeks, records the WIPO change of holder for the one § 66(a) extension, confirms ownership of record updates on every property, separately assigns the logo copyright, and updates its docket. The brand Meridian bought is the brand Meridian got.

A full worked example, end to end

Walk the Lantern & Loom acquisition once more, top to bottom, so the phases connect into a single motion.

The target. Meridian Brands agrees to buy the Lantern & Loom home-textiles business from Lantern & Loom Holdings LLC: one registered word mark (LANTERN & LOOM, Class 24), one registered logo mark (Class 24), one unused ITU (LANTERN & LOOM HEARTH, Class 24), and one Madrid § 66(a) extension covering the word mark. The recipes for its signature dyes, the customer list, supplier relationships, and the right to keep operating all move with the deal.

Phase 0. Counsel characterizes the deal as an asset purchase of a going business, inventories four properties, and immediately flags the menagerie: two registrations, one unused ITU, one Madrid extension—four different rule sets. Claimed owner (the Holdings LLC) is noted against owner of record (which, for the word mark, is still "Dana Whitfield, an individual").

Phase 1. Counsel pulls TSDR, the full assignment history, TTABVUE, WIPO Madrid Monitor, PACER, and a UCC search. The official record—not the seller's tidy schedule—becomes the baseline.

Phase 2. The chain reconstructs cleanly except for one missing link: the 2017 founder-to-LLC transfer was never papered or recorded. Counsel flags it.

Phase 3. Goodwill rode along on the registrations (the business continued; substantially similar goods)—no assignment-in-gross problem. But the HEARTH ITU was sold naked to a shell two years ago, outside the successor-business exception: a void link, and the resulting registration is impaired. Formalities on the live registrations check out; recording timing on prior links is clean.

Phase 4. The UCC search surfaces a bank security interest invisible in the USPTO record. No exclusive licenses; one small regional licensee on a short, terminable license; no live TTAB or court proceedings.

Phase 5. Title on the word mark is good, but Class 24 carries deadwood and the combined § 8/§ 9 is due in four months. The licensee relationship needs a quality-control look so Meridian does not inherit a naked-licensing problem.

Phase 6. The Madrid extension requires a WIPO change of holder and an eligibility check on Meridian (a U.S. entity—fine). No bankruptcy, no estate, no division.

Phase 7. Findings graded: no deal-killers; modest price trim for deadwood and field crowding; closing conditions cure the 2017 gap (recorded confirmatory assignment), the bank lien (payoff + UCC-3), and the void HEARTH mark (abandoned and excluded). Reps, warranties, indemnity, and a small escrow backstop the title and use representations. Post-closing, Meridian records within the § 1060(a)(4) window, records the WIPO change of holder, confirms ownership-of-record updates, separately assigns the logo copyright, exercises real quality control over the licensee, and re-dockets the maintenance calendar in its own name. Clean title, living asset, no surprises.

Common Mistakes

When to bring in counsel

A single in-use registration moving from one clean owner to another, with an obvious goodwill transfer and no encumbrances, can be diligenced by a careful buyer following this checklist. Bring in a trademark attorney the moment any validity-sensitive feature appears: an unused ITU anywhere in the chain (present or historical), a missing link needing a confirmatory or nunc pro tunc deed, a Madrid portfolio, a security interest to clear or perfect, inherited licenses that implicate quality control, a partial assignment or registration division, a bankruptcy seller, or any gap that touches your ability to sue. Those are the situations where a small misread becomes a void mark, a clouded title, or a lost standing motion. Rightsy's virtual trademark attorneys run chain-of-title and TTAB diligence, structure and paper assignments, and handle USPTO and WIPO recordation—so the diligence that protects the deal is done by people who do it every day. For the broader transactional frame, this checklist sits inside the trademark licensing and assignment toolkit, and the companion guide to trademark due diligence in mergers and acquisitions extends it to whole-company deals.

Primary authority

Verify current USPTO and WIPO recordation procedures and fees before filing; both change periodically.

Related Resources

This checklist is general information, not legal advice. Chain-of-title and assignment rules turn on specific facts and change over time; consult qualified trademark counsel—or Rightsy's virtual trademark attorneys—before relying on diligence findings or closing a transfer.

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