[BR-SBDH-1]-When a BIS Invoice or CreditNote message is enveloped, the value of the SBDH element Receiver/Identifier SHALL match the Party/EndpointID element value of the receiver party, including the value of its schemeID attribute. [BR-SBDH-2]-When a BIS Invoice or CreditNote message is enveloped, the value of the SBDH element Sender/Identifier SHALL match the Party/EndpointID element value of the sender party, including the value of its schemeID attribute. [BR-SBDH-3]-When a self-billing Invoice or CreditNote message is enveloped, the value of the SBDH element Receiver/Identifier SHALL match the AccountingSupplierParty/Party/EndpointID element value, including the value of its schemeID attribute. [BR-SBDH-4]-When a self-billing Invoice or CreditNote message is enveloped, the value of the SBDH element Sender/Identifier SHALL match the AccountingCustomerParty/Party/EndpointID element value, including the value of its schemeID attribute.