If a provider rejected the payment in the attestation portal but did not return the payment within 15 calendar days, was the provider still subject to the Terms and Conditions?

Yes. If the provider did not return the payment within 15 calendar days of rejecting the payment in the attestation portal, the provider would have been considered to have accepted the payment and must abide by the Terms and Conditions associated with the distribution. The government may pursue collection activity to collect the unreturned payment.

(Added 8/30/2021)