<prompt> Human: The purpose of the contract would be to protect myself in case any unforeseen circumstance may come up involving my friend taking off, leaving myself the only one paying back the mortgage which I cannot afford on my own. Thank you for your advice in advance. edit: Ive lived with the friend in question for 3 years in an apartment so I know we have a compatible lifestyle. Hardly any issues occurred during that time. Weve been best friends for nearly 12 years  <response>: This isnt really answering the question but that is a good way to ruin a great friend ship ,living together and having responsibilities on each other 