Bank/AR Confirmation Matcher

Joins caller-supplied bank and accounts-receivable confirmation responses against caller-supplied ledger balances on (counterparty_id, type), and classifies each pair EXACT_MATCH, TOLERANCE_MATCH, or MISMATCH, plus confirmations with no corresponding ledger balance and ledger balances with no corresponding confirmation. The match tolerance (tolerance_abs, tolerance_pct) is a caller-declared policy input; the explicit, echoed default is 0/0 (exact match required) when the caller declares neither -- there is no silent, unrecorded tolerance. A duplicate (counterparty_id, type) key on either side is reported as a data-quality flag rather than silently overwritten -- only the first occurrence on each side is joined. Third of three ARCB-K-1 substantive audit-recalculation kernels. NaN-safe. Zero network, zero PII.

Tool URL: https://ainumbers.co/chaingraph/art-464-confirmation-matcher.html