A computer-implemented method for electronically obtaining an agreement authorizing a digital signature prior to invoicing to comply with a regulation in a tax jurisdiction. The method comprises associating a set of suppliers with a user and retrieving from a database a set of buying companies associated with the user's set of suppliers. A list of purchasing tax countries associated with the retrieved set of buying companies is created by querying the database. A list of tax countries associated with the retrieved set of buying companies is created by querying the database. A country-to-country relationship database table is configured to identify purchasing tax country and tax country relationships that require the agreement authorizing a digital signature prior to invoicing. The country-to-country relationship database table is queried for any combination of purchasing tax country and tax country from the lists of purchasing tax countries and tax countries that requires the agreement authorizing a digital signature prior to invoicing. The user is electronically presented with the agreement if any combination of purchasing tax country and tax country from the lists of purchasing tax countries and tax countries requires the agreement authorizing a digital signature prior to invoicing. Acceptance of the agreement by the user is confirmed before an invoice is created involving a purchasing tax country and tax country relationship that requires the agreement authorizing a digital signature prior to invoicing.