Take a cash payment
Record cash taken in person (markets, events, donations). This logs it in Square’s books as a cash payment — so your year-end reports through Square include it — and adds a matching row to the Payments tab marked Cash — to reconcile. No card is involved. The treasurer marks the row Reconciled (then Paid) once it’s banked.
This records cash (or a check) in Square’s books as a real tender — no card involved — so your year-end reports match. It lands on the Payments tab as "Cash — to reconcile" or "Check — to deposit"; give the money to the treasurer, who marks the row Reconciled (then Paid) once it’s banked.