# Finance-fail prepaid callout → unused BB credit / credit-note path — batch 93

MM4212-MATHEK: client prepaid callout to unlock finance sign-off; finance declined. Refund chase + typo ("received" vs "haven't"); client later takes credit toward sensor. Eric confirms unused BB payment; Mulanga wants credit note.

**Lesson:** Confirm unused credit on BB before cash refund; Friday accounts cadence; prefer credit-note to SKU when client asks. Never export amounts/account numbers.