The answer needs to be in French, I am Francophone, but my English skills are better, so I'll ask the question in English.
What is the most polite way to ask someone (not a close friend) for money? It's like a donation, not a loan. I think in English they say chip in or maybe there's a better expression. It's like financial aid. What I come up with is
J'aimerais savoir si vous pouvez m'aider en envoyant xx dollars.