On 2014-01-02 00:47:05 +0000, Paul Corfield said:

I suspect it will be necessary to speak to the Oyster Help Desk to see
what they can find based on your personal details which are presumably
held against each card. I've only ever had to deal with the help desk
once but they were fine.

Yes, will do - I just wanted to confirm that there isn't a way of
marrying the number with lost details.

They may be able to move the "errant" card under your main account - I
think you can have more than one card held on one account. Having
logged on to Oyster online I see you can add another card to an
account by entering the extra card's number and completing the
security question details from when it was first registered. This all
rather assumes you can remember what it was!

I tried that and of course it says the card is already registered to
another account.

it also occurs to me that as the card has not been used for about two
years I should check it works before bunging money on it - and of
course I've no idea how much is on there already.

E.