If you didnt change it over into your name at Service Canada when you bought the boat it would still be registered in previous owners name. Get a bill of sale from him write the numbers down from the boat,take them to Service Canada they will make you out a new one in your name,be prepared to get a letter from our friendly Gov.wanting tax money,sometimes they do sometimes they dont.I registered one a few years ago that I bought for $500.00 got a letter couple weeks after registering it for $750.00 taxes,they said it was a brand new boat worth x number of dollars.Even if you did change it over when you bought it take the numbers in and they can issue you a new so called ownership.