A special messenger is a person who, at the request of either the sender or the addressee, picks up a letter from the sender’s home or place of business and carries it to the addressee’s home or place of business. A messenger or carrier operating regularly between fixed points is not a special messenger.
Sandra’s travel agency receives a request from Marcia Hess, a frequent traveler, to have some travel brochures sent to her. The travel agency normally uses the Postal Service for carriage but decides for this occasion to use a private carrier that offers a 2-day service. Because this private carriage is done on an infrequent, irregular basis, the criterion for this exception is met.