<prompt> Human: Ill try to keep this short: a good friend of mine best friend from the start of high school has an expense he needs paid in the next week or so, for around 850. His original plan was to use the refund check from our university to pay it since its good for over a grand, but university politics is pushing the date the checks go home back another few weeks.So, Im willing to just loan him the money to pay it off, and hell reimburse me in a few weeks. But Im not sure what the best way to do this is or anything. Cash, check, or something else?Any help is appreciated, thanks!  <response>: Method of payment doesnt matter, just have him sign a promissory note.Then be prepared to lose the friend or lose the money, because it may come down to that decision. 