When I did it in Indiana said it had to be on the Indiana form ONLY. Since I keep the trailer in Ohio, the Ohio officer was kind enough to complete the Indiana form for me. Indiana BMV made a point that they would not accept an Ohio VIN sheet. Desk Sargent was a bit confused when I called but because the RV is 36' long the officer said he would come to me. Took him all of 15 minutes.
Trailer was made in Indiana and I had the manufacture certificate but since I bought it in Ohio, I had to do the VIN verification.