E-Invoice Center roles Seller The Seller is the OpenText customer that uses E-Invoice Center to create legal, digitally signed e-invoices. Buyer The Buyer is the customer of the Seller. The Buyer receives e-invoices from the Seller. Appointee The Appointee is the person in the Seller’s organization who handles the logon credentials on behalf of the company. The responsibility for the logon credentials is delegated to the Appointee by the Authorized Signatory of the Seller’s organization, for example by the CFO (Chief Financial Officer). The Appointee is specified in an enrolment form that is used to apply for logon credentials from TrustWeaver, and in the Appointment Letter that is used to formally authorize the Appointee to manage production service logon credentials. The logon credentials are sent to the Appointee, who extends the responsibility for the credentials by distributing the information to the Developer (see below). The Appointee is responsible for distributing the logon credentials in a secure manner. Developer The Developer is the person who implements and configures E-Invoice Center, for example an OpenText consultant. To configure the Design Center Project, the Developer uses the logon credentials from the Appointee. The Developer can test the Project and validate the e-invoices produced using the TrustWeaver e-Invoice Audit Page for testing. End User (in contact with legal authority) The End User is the person in the Seller’s organization in contact with tax authorities, for example the CFO. The End User can prove the authenticity and integrity of archived e-invoices using the TrustWeaver e-Invoice Audit Page for production.