With every file that a vendor submits, either a VAT500 for summary level supporting data or a VAT501 for line item level supporting data is generated and sent to the vendor on eFiling (for data submitted on the Direct Data Flow channel).
The vendor must open the authorisation letter (VAT500 or VAT501). The vendor must then decide whether the data submission is correct and complete.
If the vendor realises that the incorrect data was submitted, the vendor can correct the data and re-submit to SARS. If the vendor realises that the submission is incomplete the vendor can submit more files and each time view the authorisation letter until the letter displays the correct values. Once the vendor is satisfied with the values as displayed on the authorisation letter, the vendor can authorise the data submission.