A method of implementing buyer and seller transactions is provided. A set of rules for accepting information into a document is received from the buyer. Also defined is the form of the presentation of an interface to the seller for creating the seller's invoice. The seller also receives address information from the buyer. The rules for accepting information, the rules regarding presentation and the address information are stored in a storage resource. The rules regarding presentation are accessed from the storage resource, and an interface is presented to the seller based on those rules. The rules for accepting information are accessed from the storage resource, and information for the document based on those rules is accepted through the interface. The address information is accessed from the storage resource, and the document with the accepted information is sent to the buyer.