We’ve recently made an update to some of the wording in our MDC Guidance and Error Codes document.

The changes have been made to ensure the information in the document gives accurate guidance on how you should submit your monthly MDC files to us. Specifically, additional details surrounding MATs, payroll providers and characters that must and mustn’t be used have been clarified.

The most up to date version of the MDC Guidance and Error Codes document, along with previous tracked changes versions, can be found on our website.