E-mail for Boat Registration:

IOM Registration and Certification

If you are registering a new boat supply the Registrar with the design name and designer as well as your full contact information. To receive your Certificate the boat must be measured and that paper work must sent (a scan is fine) to the Registrar and a USA Certificate will be sent to you.
The proper forms are available here:

If a transfer of a boat with a Certificate fill out the bottom of the Certificate in the Transfer Section and send to the Registrar (again a scan is fine) along with your contact information, a new Certificate will be sent to you in your name.

If a Transfer of a boat without a Certificate simply let the Registrar know you are the new owner. Hopefully you will get the boat measured and a Certificate will be issued.

There is a $7.50 fee for Registration or a Transfer.