IANAL, but the US generally requires tax-deductible donations go to 503(c) (a tax code) non-profit corporations and get a receipt from the organization to prove your donation. I say "generally" because even if your taxes were audited, auditors are overworked people, who usually don't take their jobs seriously enough to harass someone over a $100 donation to any organization with "foundation" in the name, especially if you can produce a receipt. They're usually just happy if you show up with any documentation at all. To them that's a sign you at least intended to do the "right thing". Auditors are people, too. Gerhard Killesreiter wrote:
No, of course it won't. Countries give tax deductions to further some causes (welfare, whatever). Why should the US taxpayer give tax deductions to Canadian good causes?