A set of instructions issued to a periodical or print medium authorizing publication of an advertisement on a particular date or in a particular issue in accordance with the specifications stated on the order.

These may include size of ad, date or issue of insertion, position desired, applicable discounts or contract rates if any, and whether advertisement accompanies or will follow separately. Additional instructions may request proofs, tearsheets, and/or checking copy.

If the order goes separately from the ad, a copy of the order must accompany ad.