<prompt> Human: Hi guys, just wanted to know if this is illegal or would cause any problem for me in the future. So my friend is planning to move into a new, upper end apartment in NYC. Now Ive known him since we were kids; he has a stable job and comes from a wealthy family so he can afford to pay the rents. However, he hasnt lived in the states long enough to build his credit. So he asked me to sign as a co-applicantco-occupant that way the requirements are met. I will still be living in my own place, and signing the co-application would basically give me two addresses. I do trust my friend to make full rent payments on timely fashion, but it still feels kind of iffy and just wanted to check if this would be problematic for me in the future. Thanks!  <response>: Its absolutely problematic, even between best of friends and family.Dont co-sign unless youre willing to pay the entire lease AND lose your deposit. Obviously if its gone that far, throw the friendship out the window, too.Do a search for cosign on this subreddit, youll see the ugly side of it. 