California State University,
Identification: All departments and offices which use campus mail facilities must include their department and mail code as part of the return address on all outgoing mail. Business reply letters and cards, parcels, printed permits and all other mail requiring postage must also display the department's name and mail code as a part of the return address.
Letter Mail: Departments mailing two or more letters at one time must bundle mail with a rubber band. If letters are to be machine sealed, letter flaps must over lap one another. Letter mail without an envelope must be tabbed or taped, not stapled. All pre-stamped mail must be sealed and separated from mail that requires machine stamping. International mail must be bundled separately from domestic mail and identified as international mail.
Parcel/Book Mail: All parcel and book mail must be sealed and wrapped by the sender. All pre-stamped mail must be sealed and separated from mail that must stamped. Mail that does not conform to these standards will be returned to sender for correction.