I also have a customer that's receiving the error message telling them to try again later, only to have it fail again. They made a partial payment, successfully, about a week ago and then when they tried to pay the balance, yesterday, it failed. I resent the invoice, reflecting the balance due and it failed again today with the same message. This customer lives in an entirely different state and we really depend on this service to make sure our customers can pay on time, which allows us to pay our bills on time. Any solution other than switch to another service? I have QB Desktop Pro 2019