When merchants indication a contract which has a payment processor, they agree to be subject to fines if they fall short to maintain PCI DSS compliance. Formally attest your compliance. An AOC (attestation of compliance) is the form you utilize to signal that you choose to’ve obtained PCI DSS compliance. https://www.nathanlabsadvisory.com/blog/nathan/boost-your-business-with-mas-cloud-advisory-solutions-in-singapore/