Donation envelopes are used for fundraising, money collection, charity donations. These fundraising envelopes contain an inner pocket to hold cash or a check. Donation Envelopes are sealed by a moistenable glue on the flap and typically measure 3 5/8" x 6 1/2" when closed (Known in the print world as a #6 3/4 Remiitance). Custom printing options also include organization logos and text or recipient addressing, which enables your envelopes to arrive pre-addressed to potential donors. Donation Envelopes go by several names. These include: remittance envelopes, offering envelopes, tithe envelopes.