Give to the Poor Trophy in Red Dead Redemption 2
Give to the Poor
Donate $250 to the gang tithing box.
How to unlock Give to the PoorMissable
At every camp, you will see an icon of a box with a dollar sign on it. This is the gang's tithing box. There are three ways you can donate to it: put money in it, donate valuables (pocket watches, belt buckles etc.) or donate things to Pearson for funds (which will go directly to the camp funds).
While the trophy is missable (it must be done before Chapter 5), it's fairly easy, as you will have to do many robberies via story missions, which will all yield several hundred dollars apiece so it's easy to just take $250 of that and put it in the tithing box. You can even back up your save and reload after donating the money if you don't want to part with it.
[Credit to themindisacity]