Converting from machine to visual description: A handwritten credit fax is usually a handwritten letter on letter paper or white paper, using a pen or fountain pen. It contains your personal information, company information or other relevant information, and generally also contains information such as fax number, date and signature. To fax a handwritten credit to the other party, it needs to be converted into digital form through a fax machine or scanner, and then sent to the other party via fax or email. The recipient can print out the credit fax and see the information on it.