don't see the need for you to do that? in the past the wording has been along the lines of:-
'Tickets will be available to season ticket holders, official members and fan card holders'
that above is what is listed for City away so should stay the same for EURO aways, if looking for homes at a later date you might struggle as a fan card holder though?
that being said if membership isn't renewed we'd thought you'd just revert to being a fan card holder as such but the members card would no longer be of any use and everything would be a paper ticket, a mate never renewed his membership last season but was still easily able to get his league aways.