Additional edge pathways

Customer pays with large note and drawer lacks change

Prompt to break note, borrow from petty cash, or accept Yape/Plin, with audit

Depends on: FAIL-0001

Cashier gives wrong change discovered at close

Variance attribution workflow

Depends on: FAIL-0001

Order sent to kitchen twice (double tap)

Idempotent send with duplicate-ticket warning

Depends on: FAIL-0001

Kitchen ticket printed but order cancelled before cooking

Cancellation ticket and waste decision

Depends on: FAIL-0001

Item price changed while ticket open

Lock price at order time with manager-approved update

Depends on: FAIL-0001

Promotion expires while cart is open

Re-evaluate and show change before payment

Depends on: FAIL-0001

Happy hour ends mid-order

Price by time of order entry, configurable

Depends on: FAIL-0001

Tax rate changes while ticket open

Tax by document date rule

Depends on: FAIL-0001

Refund to original tender when that tender is not available (e.g. Yape of other person)

Choose cash/store credit with note

Depends on: FAIL-0001

Partial refund of split-tender sale

Allocation rules across tenders

Depends on: FAIL-0001

Gift card lost or stolen after redemption attempt

Block and reissue

Depends on: FAIL-0001

Customer asks for factura after boleta already issued

Void via NC and re-issue within rules

Depends on: FAIL-0001

Customer asks to change RUC on factura after issue

NC + new factura flow

Depends on: FAIL-0001

Boleta issued with wrong DNI above [amount omitted]

Correction path

Depends on: FAIL-0001

Sale for foreign tourist (no DNI) above [amount omitted]

Passport/CE doc type

Depends on: FAIL-0001

Sale to non-domiciled buyer

Document type 0/7 and exception handling

Depends on: FAIL-0001

Document number consumed by crash before commit

Gap-recovery by void/baja policy

Depends on: FAIL-0001

Printer prints document but SUNAT rejects it

Reprint warning and corrective flow

Depends on: FAIL-0001

SUNAT accepts but local DB lost the CDR

Re-query CDR by ticket/ID

Depends on: FAIL-0001

Digital certificate private key password forgotten

Recovery guidance, contingency mode

Depends on: FAIL-0001

Business changes tax regime mid-year

Regime effective-date handling

Depends on: FAIL-0001

UIT or rate parameter updated by law

Signed parameter pack update (offline-installable)

Depends on: FAIL-0001

Holiday / non-business day deadlines for SUNAT submissions

Calendar-aware deadline math

Depends on: FAIL-0001

Power cut for hours (apagón) in market

Phone/battery-only mode, paper fallback book, later reconcile

Depends on: FAIL-0001

Mobile data only (no Wi-Fi) for SUNAT send

Queue with data-saver mode

Depends on: FAIL-0001

Very slow 2G/3G links

Compress, chunk, resumable send

Depends on: FAIL-0001

Shared phone used by multiple cashiers

Fast PIN switch without losing cart

Depends on: FAIL-0001

Cashier leaves with open register

Remote close by manager with count later

Depends on: FAIL-0001

Employee quits owning unsynced device data

Revoke and recover

Depends on: FAIL-0001

Product sold below cost (loss warning)

Confirm with reason

Depends on: FAIL-0001

Barcode printed twice for different items

Duplicate-barcode resolver

Depends on: FAIL-0001

Scale and barcode both give weight

Priority rules

Depends on: FAIL-0001

Bulk item sold in fractions with rounding drift

Rounding ledger at stock level

Depends on: FAIL-0001

Inventory unit mismatch (bought in cases, sold in units)

Conversion check on receive

Depends on: FAIL-0001

Recipe changes while stock exists

Versioned recipes

Depends on: FAIL-0001

Cash sale recorded as Yape (or vice-versa)

Method correction with audit

Depends on: FAIL-0001

Cross-day Yape confirmation

Pending until verified; day assignment rule

Depends on: FAIL-0001

Tip received via Yape to personal phone

Record as tip without business revenue

Depends on: FAIL-0001

Customer overpays by transfer

Credit/refund path

Depends on: FAIL-0001

Chargeback after Tap to Pay sale

Dispute record

Depends on: FAIL-0001

Device language/locale changed mid-shift

Keep app locale stable

Depends on: FAIL-0001

Owner forgot PIN and recovery code

Documented hardship recovery with identity proof to vendor (no backdoor)

Depends on: FAIL-0001

Antivirus/OS blocks app files

Whitelisting guidance, integrity manifest

Depends on: FAIL-0001

Windows update reboot during service

Active-hours guidance, auto-resume

Depends on: FAIL-0001

Android battery optimizer kills app

Foreground service and whitelist guide

Depends on: FAIL-0001

iOS background restrictions for LAN servers

Keep hub on Windows/Android

Depends on: FAIL-0001

Cheap Android with 1–2GB RAM

Memory-safe UI paths

Depends on: FAIL-0001

Keyboard-wedge scanner typing into wrong field

Focus guard

Depends on: FAIL-0001

Touchscreen ghost taps

Debounce and confirm destructive actions

Depends on: FAIL-0001

Accidental swipe-delete of line

Undo toast

Depends on: FAIL-0001