In Norway, on the 3rd cycle, if it actually accepts more tries, you have to sign the receipt and if the purchase is more than 1000 NOK/130ish USD (might be higher) they have to phone the bank to verify/get a verification code to put on the shops receipt.
Often it will just deny the transaction completely and the shop queue grows _looong_
My understanding from working in a bank in the UK is that it is the shop's discretion to use signature instead of PIN with Chip & Pin however the bank does not refund/guarantee fraudulant signature transactions like it would a PIN code.
Often it will just deny the transaction completely and the shop queue grows _looong_