There are exactly two ways a member's balance can move, and both leave a trail. That's the whole design — one book saying everyone's square while the other says nothing came in is the failure this is built to prevent.
Recording a payment (cash actually moved)
A treasurer posts a Dues income row through the normal transaction form, attributed to the member. The same write that mints the ledger row decrements their balance. One action, both books.
Adjusting a balance (no cash moved)
Charging the term's dues, waiving a member's, correcting a mistake — these change what someone owes without inventing income. They write no ledger row, on purpose, and each carries the reason you typed.
Didn't find it?
Search covers the full text of every article — if it isn't there, it probably isn't written yet, and that's worth telling us.