Billing Reconciliation Drill: Match Payments, Access, Refunds, and Invoices

A customer paid, the invoice says one thing, product access says another, and support needs an answer. Participants reconcile a deliberately messy billing ledger with provider events, invoices, refunds, subscription changes, and account permissions.

The lab focuses on evidence and recovery: build a single source of truth, detect mismatches, handle manual corrections, prevent duplicate access changes, and write support notes that are accurate without exposing private data.