Supplier numbers of the public sector
The supplier number is an identification of the biller in the systems of the invoice recipient. Therefore the supplier number varies from invoice recipient to invoice recipient. Usually a biller has a single supplier number per invoice recipient and can use the same supplier number on all invoices to the same invoice recipient.
Special rules for supplier numbers are described on the page of the Other Public Sector Invoice Recipient.
If you do not yet know your supplier number, please contact the commissioning department or the invoice recipient directly. Neither the E-RECHNUNG.GV.AT support nor the USP hotline can provide any information in this matter.