Independent analysis · 2026
Registering an aircraft means formally recording it on a national or territorial registry so that it acquires a nationality mark, a legal identity, and the right to operate under that state's oversight. The process follows a broadly consistent sequence—establish eligibility, prepare documentation, submit to the competent authority, and receive the Certificate of Registration—but the exact requirements, timelines, and costs vary significantly by jurisdiction. At Flyxchain we work exclusively on the buyer's side, so everything we describe here reflects what an acquiring party actually needs to navigate, free from any intermediary interest.
Aircraft registration is the act by which a state formally records an aircraft in its civil aviation register, conferring on that aircraft the nationality of the registering state and making the state responsible for its airworthiness oversight. This obligation flows from Article 17 of the Chicago Convention (ICAO Doc 7300), which establishes that aircraft have the nationality of the state in which they are registered, and from Article 20, which requires that every aircraft engaged in international navigation carry its nationality and registration marks.
For a buyer, registration is not a formality: it determines which authority issues the Certificate of Airworthiness, which rules govern maintenance (for example, EASA Part-M or Part-CAMO for aircraft on an EASA-member registry), which courts have jurisdiction over the aircraft as an asset, and how any security interest is perfected and recognised internationally under the Cape Town Convention and its Aircraft Protocol.
Choosing the wrong registry—or registering under an ownership structure that does not satisfy the registry's eligibility rules—can create operational restrictions, financing complications, or forced re-registration later. We address how to choose the right jurisdiction separately, and the interaction between registration and ownership structuring deserves its own analysis.
Every registry sets its own eligibility criteria, but the common thread across ICAO member states is a requirement for a genuine connection between the registering party and the state: the owner, operator, or both must be a national, a resident, or a legal entity incorporated and controlled in that state, to a degree defined by national law.
In EASA member states, Regulation (EU) 2018/1139 and the implementing rules delegate registration to national competent authorities (NCAs), each of which publishes its own eligibility conditions. Some states require majority ownership by nationals or EU/EEA entities; others accept any legal entity incorporated locally regardless of ultimate beneficial ownership, provided the aircraft is operated under that state's oversight.
Common ownership vehicles used at registration include direct individual ownership, companies (Ltd, GmbH, SAS, OÜ, and equivalents), and special-purpose vehicles (SPVs) set up specifically to hold the aircraft. Each structure has implications for VAT treatment, import duty, liability ring-fencing, and the ability to grant a mortgage or other security interest. We cover ownership structuring in depth here.
One pattern we observe consistently on the buyer's side: eligibility is often confirmed too late in the transaction, after a purchase agreement is already signed. Verifying eligibility—and the precise corporate documentation the registry will require to prove it—should happen before heads of terms are agreed, not after.
The documentation package for registration is broadly consistent across registries, though the exact forms, notarisation requirements, and apostille obligations vary by jurisdiction. Confirm the current checklist with the relevant authority before submission.
Proof of ownership. A Bill of Sale or equivalent transfer document, executed by the seller and accepted by the buyer, demonstrating an unbroken chain of title. Some registries require a back-to-birth title history—every transfer since manufacture—while others accept a title search certificate from a recognised escrow or title company.
Proof of eligibility. Corporate documents (certificate of incorporation, articles of association, shareholder register, or equivalent) demonstrating that the registering entity meets the registry's nationality or incorporation criteria. For individuals, passport copies and, where required, proof of residency.
Deregistration Certificate (if previously registered). If the aircraft is currently on another registry, the seller must obtain a Certificate of Deregistration (or an irrevocable deregistration and export request authorisation, IDERA, under the Cape Town Aircraft Protocol) before or simultaneously with registration on the new registry. An aircraft cannot be on two registries simultaneously under Article 18 of the Chicago Convention.
Application form. Each authority has its own form. In EASA states, the NCA's form typically captures aircraft data (manufacturer, model, serial number, MTOW), owner and operator details, and a declaration of eligibility.
Airworthiness documentation. Registration and airworthiness certification are separate processes, but they are often initiated in parallel. The registry will typically require evidence that an airworthiness review or import inspection is underway or completed before issuing, or simultaneously with, the Certificate of Registration.
Fees. Registration fees are set by each authority and vary considerably. Confirm the current fee schedule directly with the registry.
The following sequence describes the general process for registering a used aircraft on a new registry. Steps may overlap or be ordered differently depending on the jurisdiction and whether the aircraft is new from the manufacturer.
Step 1 — Confirm eligibility and select the registry. Before any transaction documents are signed, verify that the intended owner or operator entity meets the registry's eligibility criteria. If the structure needs to be adjusted, do it now. See our guide on how to choose the right jurisdiction and our analysis of available registries.
Step 2 — Conduct title and lien search. Commission a title search through a recognised aviation title company or legal counsel to confirm the seller has clear title and that no undisclosed liens, mortgages, or security interests encumber the aircraft. This is a buyer-protection step that registries do not perform on your behalf.
Step 3 — Execute the purchase agreement and Bill of Sale. The Bill of Sale is the primary transfer instrument. It must typically identify the aircraft by manufacturer, model, serial number, and current registration mark, and be signed by an authorised representative of the seller.
Step 4 — Obtain deregistration from the current registry. Coordinate with the seller to obtain the Certificate of Deregistration (or IDERA export authorisation under Cape Town). Timing is critical: many registries will not process a new registration application until deregistration from the previous registry is confirmed or simultaneous.
Step 5 — Submit the registration application. File the completed application form, proof of ownership, proof of eligibility, and any supporting documents with the competent authority. Some registries accept electronic submission; others require originals or certified copies.
Step 6 — Obtain a temporary or provisional registration (where available). Several registries issue a temporary Certificate of Registration to allow the aircraft to operate while the full certificate is processed. Confirm whether this is available and what operational limitations apply.
Step 7 — Initiate the airworthiness process in parallel. Apply for import airworthiness inspection or validation of the existing Certificate of Airworthiness with the new authority. In EASA states, this typically involves a CAMO taking on the aircraft's continuing airworthiness management and an airworthiness review being conducted.
Step 8 — Receive the Certificate of Registration. Once the authority is satisfied with eligibility, documentation, and (where required) airworthiness status, it issues the Certificate of Registration with the aircraft's new nationality and registration marks.
Step 9 — Update operational documents. The Aircraft Flight Manual, noise certificate, radio licence, and insurance must all reflect the new registration. The operator's operations manual may also require amendment if the aircraft is operated under an Air Operator Certificate (AOC) or under EASA Part-NCC or Part-IS rules.
The Cape Town Convention on International Interests in Mobile Equipment (2001) and its Aircraft Protocol, administered by UNIDROIT, create an international framework for recognising and prioritising security interests in airframes, aircraft engines, and helicopters. For a buyer financing an acquisition, Cape Town is directly relevant to registration because the International Registry of Mobile Assets (IRMA, operated by Aviareto on behalf of ICAO) records international interests independently of national registries.
When a lender takes a mortgage or security assignment over an aircraft, that interest is registered at IRMA and takes priority over subsequently registered interests, regardless of which national registry the aircraft is on—provided the state of registry is a contracting state to the Aircraft Protocol. As of the date of this article, the list of contracting states is maintained by UNIDROIT and should be verified directly.
For buyers: if you are acquiring an aircraft that was previously financed, confirm that any prior international interest registered at IRMA has been discharged before or at closing. A title search at IRMA is a standard step in any properly conducted aircraft acquisition, and it is separate from the national registry title search.
The IDERA (Irrevocable Deregistration and Export Request Authorisation) is a Cape Town instrument that a registered owner can file with the national registry, authorising a named creditor to request deregistration and export of the aircraft in the event of default. Buyers should be aware of whether an IDERA is in place on an aircraft they are acquiring, and whether it will be discharged at closing.
Based on the patterns we observe working exclusively on the buyer's side, the following issues arise most frequently—not as isolated cases, but as structural features of the process that an unadvised buyer is likely to encounter.
Title defects discovered late. A back-to-birth title search sometimes reveals gaps in the chain of ownership, undischarged liens from previous financing, or instruments that were never properly recorded. Discovering these after closing is costly; discovering them before is manageable.
Eligibility mismatches. The buyer's intended holding structure does not satisfy the registry's nationality or incorporation requirements. This is particularly common when a buyer selects a registry for tax or operational reasons without first confirming that their corporate structure qualifies.
Deregistration delays. The previous registry takes longer than expected to issue the Certificate of Deregistration, delaying the new registration and, consequently, the airworthiness process. Some registries have statutory timelines; others do not. Confirm the expected timeline before signing.
Parallel airworthiness and registration timelines not coordinated. Registration and airworthiness certification are handled by different departments or, in some cases, different authorities. Buyers who treat them as sequential rather than parallel processes extend their grounding period unnecessarily.
Incomplete or incorrectly notarised documents. Registries are precise about the form of documents they accept. A Bill of Sale that is correctly drafted but lacks the required apostille, or corporate documents that are not translated into the required language, will be rejected and must be resubmitted.
We work with buyers to identify these risks before they materialise, not after. Our role is to map the process, coordinate the parties, and flag issues that a seller's team has no incentive to raise.
Common questions
It depends on the registry. Some registries require the owner or operator to be a resident or nationally incorporated entity; others permit registration by any entity incorporated in that jurisdiction, regardless of where the ultimate beneficial owner resides. Eligibility criteria must be confirmed directly with the competent authority before structuring the acquisition.
Processing times vary significantly by registry and by the completeness of the submitted documentation. Some authorities issue provisional certificates within days; full registration can take several weeks to several months depending on the jurisdiction, the complexity of the ownership structure, and the authority's current workload. Confirm expected timelines with the registry before signing a purchase agreement.
Registration records the aircraft's ownership and nationality on the national civil aviation register. Airworthiness certification confirms that the aircraft meets the applicable safety standards and is fit to fly. They are separate processes handled by the same or different departments of the competent authority, and both are required before the aircraft can operate commercially or, in most cases, privately in controlled airspace.
Yes. Under Article 18 of the Chicago Convention, an aircraft may not be registered in more than one state simultaneously. The seller must obtain a Certificate of Deregistration from the current registry before or simultaneously with registration on the new registry. The Cape Town IDERA mechanism can facilitate this process where it applies.
A back-to-birth title search traces the chain of ownership of an aircraft from its original manufacturer's certificate of origin through every subsequent transfer to the present seller. Not all registries require it as a condition of registration, but it is standard due-diligence practice on the buyer's side to confirm clear title and identify any undischarged liens or encumbrances.
Primary references
Links to official and industry sources. Specifics vary by member state and change over time; confirm any point with the relevant authority before relying on it.
When you're structuring, valuing or checking a particular aircraft, that's our work — independently, and on your side of the table.
Request a ConsultationGeneral information. Not legal, tax or financial advice; all requirements must be confirmed with the registry and qualified local advisors.