Nothing additional you need to do to access your old Cash App card. Only accessing a Cash App account is enough. But if it has been a long time since you left using the Cash App payment app then most probably your Cash App card might have expired. So, there is no use for an old and expired Cash App account in the first place. At this what best you can do is to order a brand new Cash App account. Apart from a black color Cash App card you can order white, glow in the dark.