Void the duplicate invoice

Verifier checks

Score 1.00 · 7 of 7 checks passed

• The later copy INV-1044 (created 10:06 UTC) is voidvoid
• The original INV-1043 is still open and unchangedsent
• INV-1049 (same items, different quantity — not a duplicate) untouched
• No credit note was used to cancel the duplicate
• No other invoice was changed
• No collateral changes outside what the task requires
• Finished within the step budget (60)3 steps

Tool calls

3 calls, in order. Results are shortened to 2,400 characters.

1. 1.list_customersread

   {"query":"Bluebird Apps"}

   {"count":1,"customers":[{"customer_id":"c-bluebird","name":"Bluebird Apps","email":"ap@bluebirdapps.example","country":"United States","payment_terms":"Net 30","payment_terms_days":30,"tax_exempt":false,"exemption":null,"non_profit":false,"late_fees_in_terms":true,"standing_discount_pct":0,"open_invoices":4,"open_balance":"$11345.90","open_balance_cents":1134590,"credit_balance":"$0.00","credit_balance_cents":0}]}

2. 2.list_invoicesread

   {"customer_id":"c-bluebird","open_only":true}

   {"as_of":"2026-03-09","count":4,"invoices":[{"invoice_id":"INV-1035","customer_id":"c-bluebird","customer_name":"Bluebird Apps","status":"overdue","issue_date":"2026-01-08","due_date":"2026-02-07","days_overdue":30,"po_number":null,"total":"$1008.00","total_cents":100800,"balance":"$1008.00","balance_cents":100800,"last_reminder_on":"2026-02-27","late_fee_applied":false},{"invoice_id":"INV-1043","customer_id":"c-bluebird","customer_name":"Bluebird Apps","status":"sent","issue_date":"2026-02-16","due_date":"2026-03-18","days_overdue":0,"po_number":"BB-0907","total":"$3355.76","total_cents":335576,"balance":"$3355.76","balance_cents":335576,"last_reminder_on":null,"late_fee_applied":false},{"invoice_id":"INV-1044","customer_id":"c-bluebird","customer_name":"Bluebird Apps","status":"sent","issue_date":"2026-02-16","due_date":"2026-03-18","days_overdue":0,"po_number":"BB-0907","total":"$3355.76","total_cents":335576,"balance":"$3355.76","balance_cents":335576,"last_reminder_on":null,"late_fee_applied":false},{"invoice_id":"INV-1049","customer_id":"c-bluebird","customer_name":"Bluebird Apps","status":"sent","issue_date":"2026-03-02","due_date":"2026-04-01","days_overdue":0,"po_number":"BB-0921","total":"$3626.38","total_cents":362638,"balance":"$3626.38","balance_cents":362638,"last_reminder_on":null,"late_fee_applied":false}]}

3. 3.void_invoicewrite

   {"invoice_id":"INV-1044","reason":"Duplicate invoice for same work"}

   {"invoice_id":"INV-1044","status":"void","customer_id":"c-bluebird","customer_name":"Bluebird Apps","billing_email":"ap@bluebirdapps.example","issue_date":"2026-02-16","due_date":"2026-03-18","days_overdue":0,"po_number":"BB-0907","notes":"","lines":[{"line_id":"ln-1044-1","item_id":"it-ux-audit","description":"UX Audit","quantity":1,"unit_price":"$1850.00","unit_price_cents":185000,"discount_pct":0,"discount":"$0.00","discount_cents":0,"tax_rate_id":"tax-std","tax_rate":"Standard 8.25%","net":"$1850.00","net_cents":185000,"tax":"$152.63","tax_cents":15263,"line_total":"$2002.63","line_total_cents":200263,"credited_quantity":0},{"line_id":"ln-1044-2","item_id":"it-design-hour","description":"Hourly Design","quantity":10,"unit_price":"$125.00","unit_price_cents":12500,"discount_pct":0,"discount":"$0.00","discount_cents":0,"tax_rate_id":"tax-std","tax_rate":"Standard 8.25%","net":"$1250.00","net_cents":125000,"tax":"$103.13","tax_cents":10313,"line_total":"$1353.13","line_total_cents":135313,"credited_quantity":0}],"subtotal":"$3100.00","subtotal_cents":310000,"discounts":"$0.00","discounts_cents":0,"tax":"$255.76","tax_cents":25576,"late_fees":"$0.00","late_fees_cents":0,"total":"$3355.76","total_cents":335576,"amount_paid":"$0.00","amount_paid_cents":0,"credits_applied":"$0.00","credits_applied_cents":0,"balance":"$0.00","balance_cents":0,"payments":[],"credit_notes":[],"late_fee_history":[],"reminders":[],"created_at":"2026-02-16T10:06:00.000Z","sent_at":"2026-02-16T10:07:00.000Z","sent_to":"ap@bluebirdapps.example","voided_at":"2026-03-09T09:00:21.000Z","void_reason":"Duplicate invoice for same work","as_of":"2026-03-09"}