Offer your thoughts or opinion on the input financial query or topic using your financial background.

Should I give to charity by check or credit card?
The definite answer if you want to give a larger amount of money is: Ask the charity. Just drop them a mail with something like: Dear Sirs, I've decided to donate you $1,000,000 because I like what you do. Could you please tell me which option is more convenient and less costly for you? I can do either an online debit/credit card payment, send you a check by mail, or make a bank transfer [cross out whichever you can't do]. I'm looking forward to hearing from you. Yours faithfully, Even if you give "just" $2,000, it's surely enough to be worth for them writing you a reply and clarifying whichever way they prefer, so you don't waste neither their time nor the money this way.