I own an Oyster card and it is associated with my Oyster online account only in order to check my travel history. I also manage contactless cards on my existing Oyster account. There is currently an outstanding balance but no auto topup.
I want to give this physical card, with its balance, to a friend. I want my friend to be able to register the card on the new account to access the travel history in the future and/or apply for partial journeys etc. Personally, I don't even care about making him available my own travel history for that Oyster card.
How can he/she transfer ownership of the card to his/her own new account?