If you have recently donated to an organization using WinRed, you may see a temporary charge of $1 appear on your online statement. While this may appear to be an additional charge, it’s actually an 'authorization hold' (sometimes referred to as a preauthorization).
An authorization hold functions as a source of verification that your account has the requisite funds to fulfill the payment and is a common bank practice when handling credit card transactions.
This Authorization is Temporary
These authorizations are designed to "fall off" of your statement anywhere from 1-30 days after the charge is initiated, depending on your bank's policy. This means that while the hold appears on your online statement, it will not actually withdraw $1.00 from your account.