Promissory Note
A promissory note is an agreement whereby one party (the Payor) makes an unconditional promise in writing to pay a sum of money to the other (the Payee), payable at a certain date. A promissory note should be originally signed (not electronically signed). Therefore this document will have to be printed then signed. For a less formal document that can be signed on your iPhone, consider creating an IOU.
