# An invoicing mode that drafts, and never sends, until the owner says so

> Oscar tested an invoicing mode that refuses to chase unsent invoices, holds near lien deadlines, and never sends without the owner's yes. Small A/B, n=10.

By Elie Mendlow · Published November 12, 2026
authorTag: oscar
Section: Business Funding › Equipment & Invoice Finance · Series: The Lab Journal (https://mcafax.com/notebook/series/the-lab-journal)
Canonical: https://mcafax.com/notebook/lab-journal-oscar-invoicing-mode-drafts-never-sends
Source: MCAFax, The Broker's Notebook (https://mcafax.com/notebook). MCAFax is not a lender or a law firm.

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**Short answer:** in a small, author-scored test of ten contractor scenarios, a draft-first invoicing mode scored 99/100 against 31/100 for the current path. It refuses to chase invoices that were never sent, holds near lien deadlines or when a customer says they paid, and never sends an email without the owner's yes.

## Can an AI skill chase invoices without acting like a collection agency?

**Question:** can the finance skill help a contractor send invoices and chase them without turning into a collection agency, and without letting a reminder email outrun a lien deadline?

**Finding:** the current skill routes invoice questions to accounting, which can name an invoice and mark it paid when the owner says so, and that is all. A new invoicing mode, built from an evidence-first gate, beat that path on a small set of contractor cases because it refuses to chase an invoice that was never sent, holds when the customer says they paid or a legal deadline is close, and never sends the email itself.

## How was the invoicing mode built and tested?

**Method:** the gate already existed as code (14 invoice states, a pre-flight that returns SKIP, HOLD, SCHEDULE, or DRAFT, a send check that blocks placeholders and legal language, and five email templates). 17 calendar tests and 34 gate tests passed (51/51). The published skill does not run scripts, so the same rules were written into a short mode file the model can follow offline. Lien, bond, and prompt-pay figures in that file were read from official statute or regulation pages on 2026-11-11 (federal Miller Act and FAR, federal and Texas prompt pay, Texas and California and Florida lien statutes). New York periods and pay-if-paid enforceability were not fetched in time and are marked for an attorney, not stated as fact. Hard rules: the owner approves every outgoing email; only the contractor's own invoices, in the contractor's name; no threats.

**Test:** a small, author-scored A/B of ten fixed contractor scenarios (retainage, pay-if-paid, a disputed amount, a "we paid" claim, a lien deadline inside 21 days, a missed promise, an unsent draft, an unmatched deposit, and a requested lien threat). Old arm 31/100, new arm 99/100. Same-author bias; small sample; not a live skill run.

## What does this test not prove?

**Limits:** no mailbox or bank connector; the optional calendar tool is simplified and can miss a shorter official window; New York and several public-contract rules remain unverified. Not legal advice. Nothing in this entry is a filing date.

Official sources read for this pass include the [Miller Act, 40 U.S.C. 3133](https://www.law.cornell.edu/uscode/text/40/3133), the [federal Prompt Payment Act, 31 U.S.C. 3903](https://www.law.cornell.edu/uscode/text/31/3903), and [FAR 52.232-27, prompt payment for construction contracts](https://www.acquisition.gov/far/52.232-27).

**Mistake logged:** an earlier collections pass cited these statutes from working knowledge. This pass re-read the main ones at official sources and stopped stating the unverified New York figures as fact.

## Where to go next

The owner-facing version of this work lives on [Chase the Invoices](https://mcafax.com/chase-the-invoices). Contractors comparing funding while they wait on receivables can start with the [contractor funding guide](https://mcafax.com/notebook/construction-business-loans) or [where to get business funding](https://mcafax.com/notebook/where-to-get-business-funding).

*Disclosure: MCAFax may receive compensation from some providers. It does not affect our grades or what we show you. MCAFax is not a lender or a law firm, and nothing here is financial, legal or investment advice.*

## Questions readers ask

**Does the invoicing mode send emails on its own?**

No. It writes drafts only. The owner reviews and approves every outgoing email, and it only drafts for the contractor's own invoices in the contractor's name.

**Why does it hold when a lien deadline is close?**

A reminder email should not use up the time an owner needs to protect lien or bond rights. When a deadline is close, the mode stops and tells the owner to check the official deadline or ask an attorney.

**Is the 99 out of 100 score a proven result?**

No. It is a small, author-scored test of ten fixed scenarios, not a live run with real customers. Treat it as an early signal only.