Hi. I wanted to buy a motorcycle yesterday. Used. After the test drive, when I was determined, I told the seller that we could sign a contract. He replied that it wasn't necessary. He gave me a green book, a copy of his ID card and said I didn't need a contract. Of course, I didn't agree and resigned. Later I read on the Internet that you need a lot more paperwork than I thought. There must be an agreement, that is obvious, but there must also be a house book and a letter to deregister and change the name. Can anyone confirm this?