Abstract: Method and system of exchanging business documents between a set of entities. The set of entities include a plurality of buyers and sellers. Identification information is received from respective entities. The identification information includes at least the names of respected entities from which the identification information is received. The information received from the entities is stored in records in a first storage resource. The records include information to facilitate the sending documents to the entities. Based on similarity between information in respective records, approximate correspondence is determined between records (a) the first storage resource and (b) a second storage resource. The second storage resource is included in an enterprise resource planning (ERP) system belonging to a first entity. Links are established between the respective records based on the approximate correspondence. A request is received to send a document from the first entity to a second entity.