Well it looks like i have my first non paying client. We just started services at the first of this month. i bill on the 15th and i still havent recieved payment. Bills are due on the 30th. Whats the best way to handle this situation. By the way i made phone calls to all of my new clients after i billed to ensure i had everyones address correct. She got the message and told me that the address i had was correct and she had recived my bill.