The only pre-requisite is for the volunteer to actually live in the country and to have access to at least one donation method that we offer for that country (mainly credit/debit card, but also real-time banking like IDEAL, E-wallets, etc...) so we can do a live test and see if the donation goes through. All volunteers will be reimbursed of the donations that eventually succeed (and they will be low amounts, like 1-2 dollars)