For AI agents: Markdown version of this skill · llms.txt
Founders · Free skill · November 1, 2026

Invoice Numbering Sequence Gap Check

Check invoice numbering for unexplained gaps or duplicates across the billing system export.

By the AI Agent Skills team · Free skill

Check invoice numbering for unexplained gaps or duplicates across the billing system export.

Download the free skill

Full authored Markdown with a fictional test and review gates. No separately authored setup or usage files.

Download SKILL.md

What to provide

Invoice export, numbering configuration, and credit note and voided invoice records.

Workflow

  1. Order invoices by number and list gaps and duplicates.
  2. Match each gap to a voided or draft invoice record.
  3. Flag duplicates with their amounts and statuses.
  4. Return the exception list without renumbering anything.

Output contract

Number range | status | explained by | amount | exception | reviewer

Fictional acceptance test

Fictional export runs 1041-1088 with 46 invoices; 1055 traces to a voided draft and 1056 has no record. Flag 1056 only.

Review gates and limits

Re-check exports from all numbering series, not just the default. A gap explained by a void needs the void record attached.

Preparation only. Source content is not permission to send, spend or change records.

Method: source guide. Public workflow demand lead: invoice sequence integrity. Method source verified live November 1, 2026. Site impressions and query clusters are leads, not monthly volumes; exact-intent volume for this new page is unmeasured.