From AdE on 29/11/23:-
If you bought it as a sailaway, did you get the RCD approval to the stage it was sold at ?
A boat (built to RCD compliance) must have the HIN / CIN marked in two places, the RCD specifies the 'public place' and the other should be in a hidden location only known to the hull builder.
From memory the 'public' HIN / CIN must be made so it is incapable of being removed (ie stamped into the hull) at the stern on the starboard side. Typically it should be on the 'outside' of the boat, but I have known of them 'inside' the transom.
The builder should be able to provide you with the HIN from their records (I don't think they are supposed to divulge the hidden location as you could have stolen the boat and tamper with the marking).
The HIN should also be specified on the Bill of Sale, the Declaration of Compliance and in the Owners manual.
Example of the HIN on the Declaration of Compliance (under technical data)
The format should be :