Thanks for the replies.

Was just wondering coz when I called the bank to activate my CC for oversea usage, the operator said that I needed to have a PIN to use the card in UK and Europe.
And he specifically mentioned that without the PIN, I will not be able to purchase at the merchant.

Is the PIN compulsory or just optional?

So when the cashier request for you to input your PIN, do you just inform that you have no PIN?
Will they proceed with the transaction?
I see. So as long as I have not activated/ requested for a PIN from Maybank, pressing enter on the CC Terminal should allow the transaction to proceed right?
How long back was that sifu? Is there any clear signage saying that PIN is required? Or will it depend on the retailer?

Hopefully I'll still get to use my cards in UK/ Europe without my PIN. I'll update this thread if I succeed or not. The Maybank CC Hotline Operator was saying that if I have no PIN, than I will not be able to purchase at certain retailers. I checked online and it mentioned that un-manned terminal are usually the ones that require a PIN input.