Field help (SSTAVRREQ) 

Use this field to select if the user can create and save sales documents for non-validated addresses.

Select Yes to validate the address information, which can prevent an invalid or incorrect tax calculation. If Yes is selected, the user cannot create or save a document if a delivery address or site address is not validated.

Select No to authorize information from addresses that have not been validated. If No is selected, the user can create or save a document, but they are warned that the address has not been validated.

'SEEINFO'Addresses can be validated in several functions or using theAddress validation tool.