21 CFR 1305.28 - Canceling and voiding electronic orders.
(a) A supplier may void all or part of an electronic order by notifying the purchaser of the voiding. If the entire order is voided, the supplier must make an electronic copy of the order, indicate on the copy “Void,” and return it to the purchaser. The supplier is not required to retain a record of orders that are not filled.
(b) The purchaser must retain an electronic copy of the voided order.
(c) To partially void an order, the supplier must indicate in the linked record that nothing was shipped for each item voided.