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Answers · Machine shops

Shipped but Not Invoiced, Waiting on Certs: The Closeout Queue a Job Shop Can Count

When parts are shipped but not invoiced because the shop is still waiting on certs, the first-article report or a portal upload, the money is not late yet — its clock has not started, and every day the invoice waits is a day added to the end of the customer’s terms. In an ERP, “shipped not invoiced” is an accounting report. This guide is about the job shop’s side of it: the documents that hold an invoice back, what the UCC and federal payment rules say about when the clock starts, a same-day closeout rule with one owner, a count of shipped-not-billed jobs by age, and why first-article inspection and certs belong on the quote as lines of their own.

By , founder of Lumina Business Advisory · Updated · Sources checked · Editorial standards

Why a shipped-not-invoiced job costs more than it looks

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Hand-off 4 of 6 · Delivery → Invoice

How many days pass, typically, between finishing work and sending the invoice?

Choose the answer that sounds like your business.

Answer it in the Self-Audit

A job that ships on Tuesday and invoices two weeks later does not look like a problem. Nobody is late. The customer owes nothing yet, so there is nothing to chase, and the job drops off the floor’s board the moment it leaves the dock. The cost is in the calendar: the customer’s terms start counting from the invoice, so the cash arrives two weeks later than it could have, every time.

The UCC says this plainly. Under UCC § 2-310(d), unless otherwise agreed, “where the seller is required or authorized to ship the goods on credit the credit period runs from the time of shipment but post-dating the invoice or delaying its dispatch will correspondingly delay the starting of the credit period.” On federal work the rule is stricter still: under the Prompt Payment clause, FAR 52.232-25, the due date is the later of the 30th day after the designated billing office receives a proper invoice and the 30th day after government acceptance. No proper invoice, no clock.

This one is easy to check and easy to dismiss. In some shops the queue is empty every Friday, and the count further down shows that in an hour. In others a few jobs sit for weeks behind one missing piece of paper, and the shop is financing its customers without having decided to.

The four documents that hold an invoice back

A finished part is not a finished job when the customer’s PO asks for paperwork. Each of these has a different source and a different person who knows where it is.

  • Material certs. Mill test reports or material certifications for the stock, tied to the heat or lot number on the parts. They arrive with the material, or from the distributor on request, and they go missing when nobody files them against the job at receiving.
  • A certificate of conformance. The shop’s signed statement that the parts meet the PO. On federal orders that use FAR 52.246-15, the signed certificate “shall be attached to or included on the top copy of the inspection or receiving report distributed to the payment office,” and its text certifies conformance with “specifications, drawings, preservation, packaging, packing, marking requirements, and physical item identification (part number).”
  • A first-article report. When the PO requires first-article inspection, the report goes in before production or with the first shipment. On federal contracts with FAR 52.209-3, “the acquisition of materials or components for, or the commencement of production of, the balance of the contract quantity is at the sole risk of the Contractor” before first-article approval.
  • A portal or electronic upload. A buyer may take invoices only through its own supplier portal, with the PO number, line and documents attached. On Defense Department orders that use DFARS 252.232-7006, payment requests and receiving reports go through Wide Area WorkFlow, using the document types the contracting officer specifies, and the shop needs its WAWF registration and a designated electronic business point of contact in SAM before it can submit anything.

Any one of the four can hold the invoice, and they fail in different ways: certs get lost between receiving and the job folder, the C of C waits for someone authorized to sign it, the first-article report waits on the inspector’s queue, and the portal upload waits for whoever has the login.

What makes an invoice “proper” on federal work

For a shop that sells to the federal government directly, FAR 52.232-25(a)(3) lists what a proper invoice must contain. Among them: the contract number or other authorization, “including order number and line item number”; a “Description, quantity, unit of measure, unit price, and extended price of supplies delivered”; shipping and payment terms, including the shipment number and date of shipment; and “Any other information or documentation required by the contract (e.g., evidence of shipment).” If the invoice does not comply, the designated billing office “will return it within 7 days after receipt … with the reasons why it is not a proper invoice.” A returned invoice is a week lost before the 30 days even begin.

A shop that is a small-business subcontractor on a federal job meets the same idea one tier down. FAR 52.232-40 asks the prime, within 15 days after receiving accelerated payments from the government, to make accelerated payments to its small business subcontractors “to the maximum extent practicable,” with no fee — but only “after receipt of a proper invoice and all other required documentation from the small business subcontractor.” A missing cert can hold up the fastest money the shop is eligible for.

These are clauses as published on acquisition.gov on October 17, 2026, during the Revolutionary FAR Overhaul, when parts of the FAR are being rewritten and agencies are issuing deviations. The version that binds a shop is the one in its own contract or PO. What a commercial customer may withhold over a missing cert is a matter of that customer’s PO and state law, and a question for the shop’s contracts attorney; we give no legal advice.

One owner and a same-day rule

The fix is not a better report of shipped-not-invoiced jobs. It is making the documents ready before the parts are, so the invoice can leave the day the truck does. That takes one named owner for closeout and a checklist built when the order is entered, not when the parts are boxed.

  • At order entry: read the PO’s quality and paperwork requirements and list every required document on the traveler — certs, C of C, first article, special packaging, portal or WAWF submission.
  • At material receiving: file the material certs against the job number the same day, and flag any job whose stock arrived without them.
  • Before production: if a first article is required, schedule the inspection and the report as an operation on the traveler, with a date, so it does not wait behind the run.
  • At final inspection: the C of C is prepared and signed by someone authorized to sign it, not left for the morning after shipping.
  • At shipping: the closeout owner checks the list, assembles the package, and issues the invoice — through the portal if there is one — the same day. A job that cannot be invoiced that day goes on a short list with the missing document and who is getting it.

The same-day rule is a target, not a law. What matters is that every exception has a name and a date, and that someone looks at the short list every morning rather than at the end of the month.

Count shipped-not-invoiced jobs by age before changing anything

Before adding a rule, find out whether the shop has this problem and how big it is. The count needs nothing new: ship dates from the shipping log or packing lists, and invoice dates from the accounting file.

Pull six or twelve months of shipped jobs and match each one to its invoice. For each, subtract the ship date from the invoice date. Group the gaps — same day or next day, two to five days, six to fifteen days, sixteen days or more — and for every job past five days, write down why: certs, C of C, first article, portal, pricing question, or nobody knows. Then multiply each late invoice’s amount by its days of delay and add them up; that total, in dollar-days, is the credit the shop extended to its customers without deciding to.

Illustrative example: a shop finds 30 jobs in six months invoiced more than five days after shipping, averaging $6,000 an invoice and 12 days of delay, with certs or a portal upload behind most of the long ones. That is about $180,000 of invoices each held 12 days — cash the shop could have had a dozen days sooner, every time. The numbers are hypothetical; the count is the shop’s own, and it decides whether the rule above is worth the effort.

First-article inspection and certs as quoted lines

Paperwork that costs time belongs on the quote. A first-article inspection can take hours of inspection time and documentation for a single part number, and certs or special documentation take office time on every shipment. When those costs are buried in the part price, two things go wrong: the price is wrong on any order where the requirement appears late, and the paperwork has no line on the invoice, so nobody in billing knows it was part of the job.

Quoting the first article as its own line — with what it includes, when the report is due and that production follows approval — makes the requirement visible at order entry, where the closeout checklist starts. If the customer’s PO adds a first-article or documentation requirement the quote did not include, that is the same moment to answer it with a revised price, the way any other change to the order should be answered.

When not to buy anything — and where the Review fits

A shop that invoices from the dock every day, with a short list that is empty most mornings, has nothing to fix here. A shop whose owner ships and invoices every job personally can keep the checklist on the traveler and stop there. And software alone is not the fix: an ERP or portal can store the documents and send the invoice, but it does not file certs at receiving, sign a C of C or chase an inspector.

If the count shows real money and the cause is not obvious — or if paperwork delays sit next to other places money slips between the RFQ and the cleared payment, such as revisions run at the old price — that is where a machine shop consultant earns a fee, and it is what the Revenue Review counts. It takes two weeks, with read-only access to the shop’s shipping records, job files, invoices and accounting file; prints and anything under a customer’s ITAR or NDA terms stay where they are. It ends in a written report with a monthly dollar figure wherever the records support one, a ranked list of what to fix and a 90-day plan. We are not machinists, we do not run a shop, and there is no published machine-shop client on this site yet. A free 20-minute call says plainly when the fee is not worth it.

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If the causes are debatable, the problem crosses departments or systems, or the economics are unclear — diagnose before anyone builds. The Revenue Review: $4,500 fixed, two weeks, computed from your own records. Read a sample finding before you decide — free, no email.

Asked right after

What does “shipped not invoiced” mean?
It is a job whose goods have left the shop but whose invoice has not been issued. ERP systems report it as a list of shipments with no matching invoice. For a job shop, the causes worth checking first are paperwork — certs, a certificate of conformance, a first-article report or a portal upload — or a pricing question nobody has answered.
Does the payment clock start at shipment or at the invoice?
Under UCC § 2-310(d), unless otherwise agreed, the credit period runs from shipment, “but post-dating the invoice or delaying its dispatch will correspondingly delay the starting of the credit period.” On federal contracts with FAR 52.232-25, the due date is the later of 30 days after the billing office receives a proper invoice and 30 days after acceptance. Either way, a late invoice means late cash.
Can a customer refuse to pay an invoice without material certs?
It depends on the PO. On federal contracts, an invoice missing documentation the contract requires is not a proper invoice, and the billing office returns it within 7 days with the reasons. For a commercial customer, what it may hold back is set by its PO and state law — a question for the shop’s contracts attorney. The operational answer is the same: have the certs filed before the parts ship.
Should a machine shop charge for first article inspection?
That is the shop’s pricing decision, but a first article takes inspection and documentation time that the part price may not cover. Quoting it as its own line, with what it includes and when the report is due, makes the requirement visible at order entry and puts it on the invoice instead of inside the part price.
What is a certificate of conformance on a government order?
Under FAR 52.246-15, when the contract administration office authorizes it in writing, the contractor ships with a signed certificate instead of source inspection. The certificate is attached to or included on the top copy of the inspection or receiving report sent to the payment office, and it certifies that the supplies conform with the contract, including drawings and part number.
What is WAWF?
Wide Area WorkFlow is the Defense Department system for electronic payment requests and receiving reports. DFARS 252.232-7006 requires a contractor to have a designated electronic business point of contact in SAM and to register in WAWF, then submit the invoice and receiving report document types the contracting officer specifies.

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