Only debit cards!
The US does not issue chip'n'PIN *credit* cards, only *debit* cards. So...
When a US debit card is run *without* the PIN it is billed as a credit card (for the store) and lots of steel-rice-bowl types (as my Chinese wife would refer to them) get humongous amounts of cut out of this. And the store gets Ripped.
For years issuers of US *debit* cards have encouraged their recipients (often with money) to run them as *credit* cards. This is Walmart's response; it has nothing to do with security and it doesn't change a single thing about US credit cards (which don't have a PIN, full stop, end.)
John Bowler
Biting the hand that feeds IT
