When using Tap and Pay you may notice that there is a $1 charge in your account. Some credit card issuers will load a $1 pending transaction to your card to ensure you have money in your account and that it is valid.  

This is a pending transaction, meaning it is deducted from your available funds, but the amount will not leave your account. Once your Tap and Pay payment is cleared, the $1 will return to your available balance.