How to tag wishing wells and other charity donation points/money boxes

Wikipedia page: https://en.wikipedia.org/wiki/Wishing_well

Photo examples: link text and link text

In the UK wishing wells seem to be tagged with man_made=water_well and a rather descriptive name="Wishing Well".

Is there a tag to for a charity donation point/money box or similar to use on wishing wells and other (money) collection points?

We mark where ticket vending machines are in car parks and since some car parks require a donation it would be good to mark where the donations/money should be put.