If you saw the move A Bronx Tale when "Calogero" gets stiffed for $20 by his so called friend

he tells his Story to "Sonny" who tells him you got off cheap

now you never have to talk to him

and you learned a Lesson

NEVER EXTEND CREDIT NEVER EVER

Unless you enjoy getting stiffed

If a prospect or current client don't want  to pay you before services are performed

like EVERYONE DOES IN BUSINESS then you don't want them

Send them a certified letter you don'ttt need a return receipt request because the signature is online on the uspo track website

or u can fedex or ups 3 day or ground gets signature

tell them clearly that you unless you receive payment in 3 days

you will report it to the credit bureau through a collection attorney

and move the court for a motion for garnishment prior to final judgment

and record a lien in their county record against their property

and they will be responsible for his fee if payment is not received by 3 business days after they receive your notice