We got our SSR registration
while in Miami
We have name and our SSR # on the stern. The Brits have rules, size, colour and placement of the SSR # which we did not follow, so you could look them up and follow them for when you get home, if ever. PM me if you find them so that I will be legal
when I return home in 2 yrs time.
In the Bahamas
the don't care as long as you give them the $300 cruising fee and in the US you do need a cruising certificate which is good for a year and the cost is nominal.