<prompt> Human: I purchased a house about 2 and a half years ago by myself. My current SO of 1 and a half years has been living in my house and paying me rent for 8 months. He wants his name on the mortgage to help build his credit. He agreed to sign legal documentation that if he moves out or we separate he has no ownership of the home. I feel like this situation is more complicated that Im aware of. Please help me proceed or let me know if this is not a good idea. Edit: Thank you everyone. I shared this information with my SO and its off the table.  <response>: I think its best to keep him off the mortgage. Keep it simple. Dont fix something that isnt broken. There are other ways for him to build credit. This is just opening a can of worms for the future. I think its a bad idea and going to add unnecessary complexity to your life. 