The purpose of the ChangeAcknowledgeRequisition is to communicate ChangeAcknowledges to an existing request for goods or services. This ChangeAcknowledge must refer to the original document and/or item requested. The ChangeAcknowledge processing assumes replacement of fields sent, with the exception of: the key fields for the Order and Line.

If any of the Field Identifiers above require changing, that constitutes a cancellation of the request and/or the addition of another Requisition.