How big of a trailer?
What year?
A lot of smaller trailers don’t have a title, and the older the trailer is the less likely it has one as well.
I just bought (another) 16′ Lund last weekend. The trailer was a 2002 and the guy didn’t have a title (original owner but he wasn’t sure he ever got/had one).
Everything went seamless at the DMV with just a bill of sale and the lifetime tag number, but he and I were both prepared for him to apply for a duplicate title if deemed necessary.
Bigger trailers will likely be titled, if it’s a tandem from the 80’s or newer it’s pretty much a guarantee that it’s titled.
If it’s feasible, get the lifetime number before you plan to meet up and call the DMV. They’ll tell you ahead of time if you need the title.
One thing that’s super important in Minnesota, is that you itemize your bill of sale.
A boat with hull ID ______ and outboard serial number _____ was purchased for $______
A trailer with lifetime tag registration _____ was purchased for $____.
Reason being you only pay sales tax on the trailer with used boat private party sales.
If it’s a lump dollar amount for the entire rig, you might have to waste time getting another bill of sale for just the trailer depending on who’s behind the counter.