What number do I call if I have a question or problem with my online bill payer? For the most specific expertise about bill payer, please call 1-844-697-5600 to speak with a CheckFree bill pay service representative. They are available 7 days a week, from 7AM-1AM. Have more questions? Submit a request 0 Comments Please sign in to leave a comment. Related articles How do I pay a 3Rivers loan/credit card/mortgage/line of credit? Toll Free 800-825-3641 Local 260-490-8328 What is the cut off time for processing regular bill payments? Why does the delivery date for my bill seem to be later than it should be? When can my PMI (Private Mortgage Insurance) be removed?