I don't think I've ever really used the flex/white membership card to purchase anything, even though it would come in handy if you were to order more than £20 from the club shop as you'll get a % off.
I just order tickets through the club website, which I did for the Southend match when they became available to flex members. As long as you have an account it will automatically know that you're a flex member and will determine when tickets are available to you as a flex member. If you were to turn up on spec next week I would have thought by giving your membership number you'd be OK. Give the club a bell if you're not sure.
By all means, if there are any concerns PM me.
I just order tickets through the club website, which I did for the Southend match when they became available to flex members. As long as you have an account it will automatically know that you're a flex member and will determine when tickets are available to you as a flex member. If you were to turn up on spec next week I would have thought by giving your membership number you'd be OK. Give the club a bell if you're not sure.
By all means, if there are any concerns PM me.