Methods and systems of providing tracking or other services for a mailpiece in a mail system having a service provider that is in communication with one or more posts. The mailpiece includes one or more unique identifiers associated therewith, and the service provider uses the unique identifiers to identify the mailpiece and cause or facilitate the rendering of the requested service. The service may be requested after the mailpiece has been mailed, and payment for the services need not be made until after they are performed. Also, a method of providing stored mailpiece information to an interested party based on request criteria that are provided by the interested party.