Cards
Where it lives: at cards in the Financial Position, and on its own from the cards endpoint.
One endpoint returns all three kinds, and sub_family says which one you are holding. They share most of their shape; what differs is the part that matters for risk.
Credit cards
The ones that carry debt: limit is what the issuer granted, disposed is what has been used, available is what is left.
Debit cards
Bound to an account, spending its balance rather than a credit line.
Prepaid cards
Loaded in advance, with a balance of their own.
Type, status and brand
Movements
Card transactions are shaped like account transactions but shorter — a card movement has no running balance of its own.
Card numbers are never reconstructed. What comes back is what the institution itself displays — a masked number — and it is handled as protected data end to end. Use identifier to recognise the same card across extractions, not to store a PAN.