What the signature used to do
A signature was once a visible check at the end of a card purchase: the customer signed the receipt, and a cashier could compare it with the name or signature on the card. It was meant to help identify someone using a card without permission. But the check depended on a person noticing a mismatch and acting on it—an awkward safeguard during a busy checkout.
Security moved earlier in the transaction
Modern card payments can verify a transaction before the receipt appears. A chip generates a transaction-specific code, while contactless payments use their own security checks; the payment network and card issuer then decide whether to approve the purchase. These methods do not make fraud impossible, but they give the system stronger ways to assess a payment than a cashier’s quick glance at handwriting.
As those checks became routine, card networks no longer required a signature for many transactions. The exact requirements can still vary by payment method, location, merchant, or issuer, so a signature may remain necessary in some circumstances. But for many everyday purchases, it no longer determines whether the payment is accepted.
Why the pen still appears
Checkout systems are built from layers of software, printers, and store procedures. A receipt template may still include a signature line, or an employee may follow a routine designed before the requirement changed. Stores may also keep a signed receipt as a record, even when the signature adds little to the payment’s security.
That makes the familiar pen a small example of how practices lag behind technology: the payment can be verified electronically, while the checkout still prints a space for a handwritten mark.
