Cross-border IP due diligence is the focused check a buyer, investor or licensee runs on a company’s patents before signing: who owns them, where they are in force, what weighs on them and whether the business can operate without infringing third-party rights. ISO 56005, the ISO guidance on intellectual property management, gives a useful frame for it, and the European Commission’s IP Helpdesk has just published a checklist for deals between the EU and Latin America. This guide turns that frame into a patent checklist for transactions across Europe and Latin America.
Key takeaways
- Due diligence is not an IP audit: it is a verification with a specific purpose, usually involving a third party, triggered by an investment, acquisition, licence, alliance or international expansion.
- The core areas are ownership and chain of title, validity and territorial coverage, freedom to operate, contracts and encumbrances, and valuation.
- In Latin America there is no regional patent system: each country must be checked in its own register.
- For European patents, check the European Patent Register, the national validations and whether each patent has been opted out of the Unified Patent Court.
- A transfer only takes effect before the EPO when it is recorded with evidence (Rule 22 EPC), so unrecorded assignments are a red flag.
What is cross-border IP due diligence, and how does ISO 56005 frame it?
In its article of 31 August 2026, part of a series on ISO 56005:2020, the European Commission’s IP Helpdesk (run by the European Innovation Council and SMEs Executive Agency) distinguishes two exercises. An IP audit is a broad, periodic internal review of the portfolio. IP due diligence is a focused verification for a given operation, usually involving a third party. The article lists the typical triggers:
- investment rounds;
- mergers and acquisitions;
- licence agreements;
- strategic alliances and co-development;
- international expansion;
- calls for proposals and funded projects.
It also makes a point that matters in practice: a company that has audited its IP regularly arrives at due diligence with the answers ready, while one that has not discovers its gaps when the buyer’s advisers find them.
A patent due diligence checklist for Europe and Latin America
The Helpdesk article groups the work into five areas and adds Latin American risks. The table below applies them to patents and adds the European points that most often change the outcome of a deal.
| Area | What to verify | Europe | Latin America |
|---|---|---|---|
| Ownership and chain of title | Every inventor’s rights transferred to the seller by valid agreement; assignments recorded | Transfers recorded in the European Patent Register (Rule 22 EPC) and in national registers after validation | Assignments recorded at each national office; employee and contractor invention clauses under local law |
| Validity and status | Patents granted or pending, fees paid, no lapses, oppositions or revocation actions | EPO opposition period, national renewal fees, Unitary Patent status where requested | Annuities paid country by country; examination status in each office |
| Territorial coverage | Protection exists where the target makes, sells or will sell | Which states the European patent was validated in; Unitary Patent covers 18 EU states, not Spain | No regional system: check each country where the business operates |
| Freedom to operate (FTO) | Products can be commercialised without infringing third-party patents | Searches covering European and national patents and pending applications | Searches in each relevant national register |
| Contracts and encumbrances | Licences, exclusivities, security interests, co-ownership, standard commitments | Exclusive licences and pledges recorded; UPC opt-out status | Licences that must be recorded locally to bind third parties |
| Valuation | Price justified by the strength and scope of the rights | Remaining term, claim scope after opposition, enforceability | Coverage in the markets that generate revenue |
What should you check for European patents in particular?
The European Patent Register and Rule 22 EPC
Under Rule 22 EPC, the transfer of a European patent application is recorded in the European Patent Register on request, upon production of documents proving it, and has effect vis-à-vis the EPO only from that point. If the seller’s name is not on the register, the chain of title is incomplete until the gap is closed. After grant, the European patent becomes a bundle of national rights, so transfers must also be checked in each national register where it was validated.
The Unified Patent Court opt-out
The Unified Patent Court (UPC) has been operating since the Agreement entered into force on 1 June 2023, according to the EPO. Under Article 83 of the UPC Agreement, during a seven-year transitional period proprietors of classic European patents can opt out of the Court’s exclusive competence; the opt-out takes effect when entered in the register and can be withdrawn. For a buyer this changes where the patent can be attacked and enforced: a central revocation action before the UPC, or national courts. The status of each patent should be on the checklist.
What should you check in Latin America?
The Helpdesk article highlights four Latin American risks for European SMEs: no unified regional system, third parties registering foreign brands before the owner arrives, enforcement timelines that vary by country, and know-how protected mainly by contracts. For patents, this means:
- checking each national register separately, from Mexico’s IMPI to Brazil’s INPI, rather than relying on a family list from the seller;
- confirming that national phase entries and annuities were completed in time, because a missed deadline may not be curable;
- reviewing employment and service contracts under local law, since inventor rights and remuneration rules differ;
- checking that confidentiality agreements protecting unpatented know-how are enforceable where the know-how is used.
What this means for your business
If you are buying, investing or licensing, ask for the patent schedule early and verify it against official registers rather than the seller’s spreadsheet. If you are the target, run an audit before the process starts: record pending assignments, regularise lapsed annuities where possible and document inventor transfers. In both cases, define the scope: a full FTO in every country is rarely proportionate, while ownership and coverage in revenue markets almost always are. Our patent team can run the patent side, and our cross-border IP strategy and due diligence service covers trademarks, software and the wider portfolio.
Where cross-border IP due diligence goes wrong
- Trusting the seller’s list. Family spreadsheets often show patents that lapsed or were never validated in a given country.
- Missing the inventors. A patent filed by the company without a valid transfer from a founder or contractor leaves title open.
- Forgetting unrecorded licences and pledges, which can bind the buyer or limit exploitation.
- Ignoring the UPC. A patent that is not opted out can be revoked centrally for all participating states in one action.
- Splitting the work by country. Separate firms in each jurisdiction produce reports that do not match; one coordinated review gives the deal team a single picture.
Frequently asked questions
What is the difference between an IP audit and IP due diligence?
An IP audit is a broad, periodic internal review of a company’s portfolio, its value and its risks. IP due diligence is a focused verification for a specific operation, such as an investment, acquisition or licence, usually carried out for or by a third party. A recent audit makes due diligence faster and reduces surprises.
Is ISO 56005 mandatory for IP due diligence?
No. ISO 56005:2020 is a guidance standard on intellectual property management, not a legal requirement. It is useful as a shared frame between buyer, seller and advisers, because it organises the review into recognised areas such as ownership, validity, freedom to operate, contracts and valuation.
How long does patent due diligence take in a cross-border deal?
It depends on the number of families, countries and the depth agreed. Checking ownership, status and coverage in official registers is relatively quick if the seller provides a complete schedule; freedom-to-operate searches in several countries take longer. Agreeing the scope at the outset is what keeps the timetable realistic.
Can IP Global Guard run patent due diligence across Europe and Latin America?
Yes. We define the scope with the deal team, verify ownership, status and coverage in official registers, review encumbrances and UPC status, and coordinate European patent attorneys and qualified local correspondents in Latin America and Africa, delivering one consolidated report from a single point of contact.
How IP Global Guard supports your transaction
A patent portfolio is only worth what can be proven in the registers. IP Global Guard, the IP services line of META Channel Corporation Limited, runs IP due diligence, valuation support and portfolio structuring across more than 25 jurisdictions in Europe, Latin America and Africa with one strategy and one billing relationship.
Share the deal timeline, the target’s patent schedule and the countries that matter. We will propose a proportionate scope and a single report your deal team can use. Contact us about your transaction.
This article is general information, not legal advice, and does not replace a review of the specific transaction.
Sources
- European Commission IP Helpdesk (EISMEA), ISO 56005: intellectual property due diligence (31 August 2026)
- EPO, European Patent Convention, Rule 22 (registration of transfers)
- Agreement on a Unified Patent Court, OJ C 175, 20 June 2013 (Article 83)
- EPO, Unified Patent Court (entry into force on 1 June 2023)
- EPO, Unitary Patent: participating states
