I've tried to make a payment online today using my usual card. I have the details stored on my phone so it auto fills. I pressed pay now after entering the details (tried it 3 times, I used auto fill twice and entered manually once) and I received a notification each time saying my expiry date was invalid. My card is in front of me the entire time and all the details entered are 100% correct.
Yes I have used my card more than usual the last few days but am well below my limit so am wondering if anyone has any other ideas as to what the problem could be.