Hi @MaxWins - thanks for making your first post to the 👥 community. 

This can happen when a seller enters their own email address instead of the customer's email address in order to receive a copy of the receipt.

If this is the case, please refrain from sending customer receipts to your own email address or phone number. Our system links receipt delivery information with the card used for the purchase so customers don’t need to enter their email address or phone number when they purchase something from another Square seller. If you enter your own email address or phone number instead of allowing customers to input their information, your email address or phone number will be associated with their credit card and you may automatically receive their receipt anytime they pay another Square seller.

What you are likely seeing is a receipt for a purchase one of your customers made with another seller. You have not been charged for anything.

You can choose to be sent a payment confirmation email after every completed transaction, and you can always find detailed information about each transaction in your Square Dashboard.

I've asked a team member to take a look at your account and unlink your email from any of your customer's payment cards.