How do I register a boat, and what documents will I need?

First decide whether you need national vessel registration, sailing-class registration or both: each serves a different purpose and needs a separate application. You will usually need proof of ownership, the boat's identification details and any existing registration documents; a racing dinghy or keelboat may also need original measurement forms and an updated class certificate.

Choose the right register

Start with the boat's existing paperwork and the country where you intend to register it. Requirements depend on the flag state, your eligibility as an owner, the boat's size and its private or commercial use. No single document list covers every boat.

Keep these three processes separate:

• National vessel registration: records the boat under a country's registration system. Its legal effect and the ownership evidence required depend on the register.
• Class registration: records a sailing boat within its class and supports its class certificate and sail number.
• Other licences: a radio licence, inland-waterway licence or local operating permit may need a separate application.

A sail number alone does not establish national registration or prove ownership. If the seller says the boat is registered, ask for the certificate and check which organisation issued it before completing any forms.

Gather ownership and identification documents

For national registration, follow your chosen registry's current checklist and use its prescribed forms. Gather the following before applying, though not every register requires every item:

• Signed bill of sale or purchase invoice: identifying the buyer, seller, boat, sale date and ownership share transferred. A registry may require its own bill-of-sale form.
• Owner details: full name, address and the identity, nationality or residence evidence requested. Joint owners and companies may need additional documents.
• Boat details: builder, model, construction year, length, hull identification number and engine details where requested.
• Existing certificates: previous registration, registered name and number, plus any deletion certificate required when changing national registers.
• Supporting records: earlier ownership documents, builder's certificate, tonnage or measurement certificate, and import or tax documents where applicable.

Check the hull identification number against the paperwork character by character. It is commonly found towards the starboard side of the transom; older boats may use a different identification system. Resolve any mismatch before submitting the application.

Keep VAT, customs and conformity documents together, particularly for an imported boat. Registration does not prove that the boat's tax or import position is settled.