Be careful when you donate money. Never send a check. if you are suspicious of a scam if you used a credit card tell your bank to do a chargeback and if you ACH’d the money out of your account have your bank reverse the ACH. Banks must do this for you if requested under Federal Regulation E

http://www.foxnews.com/us/2012/12/20/victim-family-speaks-out-after-scammers-try-to-cash-in-on-newtown-tragedy/