This document discusses principles of behavioural economics that can be applied to fundraising and planned giving. It explains concepts like scarcity theory, reciprocity theory, social proof, authority, anchoring, and stewardship reporting. For example, scarcity theory suggests emphasizing limited time offers to activate people's fear of missing out. Reciprocity theory means offering small gifts to motivate larger future donations. The document advocates using these behavioral insights to improve fundraising appeals and stewardship practices.