I'm getting a lot of Lenten requests for donations.
I bet everyone is getting tons of fund raising requests from charities and religious groups who depend on the good will of donors to support their apostolates and help them to continue their good works.
Many individuals do the same thing.
I would suggest to individuals and communities who accept donations that they send some form of acknowledgement that they received the gift or monetary donation(s), not to mention a thank you note. An email seems acceptable, especially since mailing several thank you notes could get expensive these days - although, if the benefactor has no email, then a thank you note seems a necessity. At the very least, offer some form of acknowledgement to your benefactors.
"Gratitude is the most exquisite form of courtesy." - Jacques Maritain