The "VAT 5 Certificate Validation" endpoint ensures the accuracy and existence of the VAT 5 certificate details submitted by a customer. This is essential for confirming eligibility for VAT relief on certain transactions. In the context of sales transactions, if a transaction qualifies for VAT relief (i.e., isReliefSupply is true), the certificate details must be validated before processing the transaction
The contents of 4.4.4. VAT 5Certificate Validation
