RCR Yachts, serving the boating community since 1972, provide this public service announcement:
Every year vessel owners must renew documentation with the U.S. Coast Guard which costs $26 on the USCG website. However, private companies send out similar, official looking renewal letters that demand twice or three times the actual USCG fee. The scam sites look very similar to the official USCG site.
The Coast Guard has issued warnings about such practices, but not everyone has gotten the word and even life-long boat owners have fell victim. If you choose to renew your documentation online, the website is: https://www.pay.gov/public/form/start/1175233.