Sorry, I did not think of that before.
I did some reading, it says they don't support charities outside the US yet - they are working to go international - however there is no indication that the process doesn't work if you are outside the US.
There is a list of charities to choose from -
Participating Nonprofits and Schools - CharityList-A1
It wouldn't hurt to try it, if you think of it.
If you can't find a suitable charity, consider Rock County Humane Society
(where I found Stella)