Hand-match insert: The process of hand inserting personalized package elements, such as certificates of appreciation, into closed-face mailing envelopes.
Hard bounce: An email message that permanently fails to reach its intended recipient but instead returns to the sender. Causes include non-existent domains and the recipient being unknown.
Hotline list: The most recent names available on a list, typically names added within the last three months.
House list: A list of names and addresses that a non-profit has compiled from inquiries, donations or acquisition, used to request donations.
