https://anngreennonprofit.com/2026/08/10/why-its-important-for-nonprofits-to-have-a-thank-you-plan/Ann Green's Nonprofit Blogen2026-08-10T18:37:18+00:00Why It’s Important for Nonprofits to Have a Thank You Plandonor relations, writing, thank you, planning, direct mail, donor retention, donor engagement, gratitude