What is chargeback?
When a customer disputes a charge with their bank, and the bank pulls the money back from you while it's sorted out.
You can answer a chargeback with proof of the sale, like a signed receipt or a delivery record. Clear receipts and a recognizable business name on the customer's statement prevent a lot of them.
For example
A customer doesn't recognize a charge on their card statement and calls their bank. The bank takes the $80 back from you until you show the receipt.