Shoppers who have gotten used to simply 'tapping and taking' products from stores may now see their card declined more often.
This announcement comes following new measures implemented nationwide on Monday in a bid to crack down on credit and debit card fraud.
And the new rules mean that retailers must check that it's actually the cardholder that is making a payment before they debit the card used.
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To do this in a virtual setting, customers will be sent a code by their bank when ordering online - which they will be asked to enter at the checkout prior to payment being taken.
If they fail to meet the requirements to verify a genuine transaction - the card payment may be declined.
Meanwhile, those shopping in person may also see a need to enter their PIN more often following the limit increase back in October last year.
From October 15, the standard £45 contactless limit risen by 120 per cent to £100 - with cardholders also able to make £300 of transactions without entering a PIN, up from the prior limit of £130 - according to the Manchester Evening News.
However, those planning on using contactless five times in a row will be see their fifth transaction bounce automatically - instead, seeing them forced to insert their card in the reader and manually enter their personal PIN number to verify their identity.
As well as this, if a card is noticed to be used in an unusual location - for example a distance from the owner's registered address, the cardholder may in turn also see their contactless blocked until they accordingly verify the PIN code.
Your card may also be declined if you are shopping in an unusual location, in which case you may be prompted to enter your PIN.
The idea behind the moves is to create new layers of security to protect shoppers and their money.
