Proof of Delivery: The Invoice Starts at Sign-off

Proof of Delivery: The Invoice Starts at Sign-off

A correct invoice starts from proof of delivery, not from the sales order. For goods, that proof is a delivery note signed by an authorized person at the customer and captured on a phone at the door: the quantity actually received on each line, the receiver's name and signature, the time and location, a photo of the goods, and anything refused with the reason. For a service it is a completion sign-off by the customer's representative, and in contracting it is a progress claim approved by the owner's engineer or consultant. The system then turns that proof into an invoice draft with no retyping, so an undelivered line is never invoiced and the signed note stays attached to the invoice, and a later dispute is answered in one minute, not one week.

From the credit limit to the moment of delivery

In part three every customer got a verified record, a limit the system checks at every order and every delivery, and a known person who receives and approves invoices. This part is about the moment a sale becomes something you can claim: delivery. The sales order says what was agreed; what the customer pays for is what actually reached them. Between the two there are small differences that happen every day, in good faith on both sides: an item ran out in the warehouse so the shipment left short, two cartons were damaged on the road and the receiver refused them, a site asked to push half the quantity to next week.

When the invoice is issued from the sales order, it carries those differences with it, and the customer's accounts team receives an amount that does not match what their warehouse received. If your customer matches supplier invoices the way we described from the buyer's side in receiving and three-way matching, they will not pay an invoice until it agrees with their purchase order and with the receiving record they made themselves, and the whole invoice waits until the difference is explained, not just the line that differs. That is where much of the late payment we described in part one begins: no disagreement about the debt, just one document that does not match another. An invoice that comes from the same number their receiver signed for passes their matching without anyone asking.

Goods: a delivery note captured on a phone at the door

The paper delivery note is a good tool, and it still works in many companies. But it reaches the accountant days later, if it arrives at all; it can get wet or lost in the truck's glovebox; and the signature on it says neither who signed nor whether they were authorized. Moving the note to a phone does not change the idea, it changes the timing: delivery is recorded the moment it happens and reaches the system at that same moment. A good delivery note carries six items:

• The quantity actually received on each line, against the quantity on the loading order. The driver or sales rep opens the delivery order on their phone and confirms each item with the receiver, so any difference shows while the truck is still at the door.
• The receiver's name, role and signature. The authorized receiver comes from the customer record we built in part three: their storekeeper, the site engineer, or whoever the customer names for each site. If someone else signs, it shows on the note that day, not a month later.
• The time and location, captured automatically by the phone, so nobody writes a date from memory.
• A photo of the goods once unloaded, and a photo of the customer's stamp on the note if they use one. The photo is of the goods and the document, not of people.
• Refused items and the reason: damaged, not matching the order, or more than was ordered, with a photo. Refused goods go back on the truck and are recorded as returning to the warehouse, so they are not lost between what left and what was invoiced.
• The customer's purchase order number, if their accounts team requires it, which is one of the items the customer record carries.

A partial delivery is not an exception to be handled by phone. If the customer ordered 100 cartons and 60 were delivered today, the note records 60, and 40 stay open on the sales order until they are delivered or the customer cancels them. If the receiver refused 4 cartons because they were damaged, the note records 56 accepted and 4 refused, with the reason and the photo. These numbers are an example, but the principle holds: every line on the sales order ends in one of three known states, delivered and accepted, refused with a reason, or still open. No line sits in a grey zone that the accountant has to ask the driver about two weeks later.

Services and contracting: completion sign-off and an approved claim

A service does not arrive on a truck, so there is nothing to count at the door. The proof here is a completion sign-off by the customer's representative at the end of the work: what was done, when, whether anything remains, with photos of the finished work. A maintenance company serving a residential tower on a monthly contract closes every visit with a sign-off from the building manager; a hotel hosting an event on a company account closes it with a sign-off from the company's coordinator on what was actually provided; a property operator closes repairs outside the contract with a signature from whoever requested them. In work orders we explained how every field request becomes an order with a number, a status and an owner; what this part adds is that closing the work order with the customer's signature is itself the proof of delivery the invoice is built on. Extra work outside the contract needs a recorded approval before it is done, not after, or it reaches the invoice as a line nobody at the customer recognizes.

A contractor does not invoice a shipment or a visit, but completed quantities measured in a progress claim (مستخلص). The proof here is the owner's engineer or consultant approving the claim, not the contractor submitting it. The submitted claim is the contractor's estimate of what was done; the approved one is what the other side agreed to. So the claim for payment is built on the approved figures, and the difference between submitted and approved is recorded on every item with its reason, because that difference is either work not yet measured, to be included in the next claim, or a disagreement that needs an owner. How quantities are measured and costs charged to the project we covered in cost control and payment applications; the timing of the tax invoice under a construction contract is a question for your tax adviser.

From a confirmed delivery to an invoice draft

Once a delivery is complete and confirmed, nobody retypes it into the invoicing software. The system turns the confirmed note into an invoice draft: the customer from their record, prices from the approved sales order with its discount as approved in part two, quantities from the note rather than the order, and the delivery date from the phone. The accountant reviews the draft and issues it, but does not type its numbers. Three rules follow from this design, enforced by the system rather than by memory:

• An undelivered line is never invoiced. The open quantity stays on the sales order, and refused quantities never enter the invoice.
• A delivery is never invoiced twice. Each note is linked to the invoice issued from it, so it cannot enter a second one.
• A confirmed delivery never stays uninvoiced. It appears on a daily list with its age, because what was delivered and not invoiced is money nobody has asked for yet, and it is one of the balances the credit-limit check in part three adds up.

Delivery is directly tied to what the Implementing Regulations of the VAT Law require on a tax invoice. Article 53, paragraph 5 requires the invoice to show the quantity and nature of the goods supplied, or the scope and nature of the services provided, and the date of supply if it differs from the invoice date. Article 53, paragraph 1(b) sets the latest date for issuing a tax invoice for a supply between businesses as the 15th day of the month following the month in which the supply took place. In other words, the quantity and date the invoice needs are exactly what the delivery note records, and the deadline runs from the month of supply, not from the day the note reaches the accountant. If an invoice is issued for a quantity that was not delivered, correcting it after issue takes a credit note that clearly references the original invoice (Article 54, paragraphs 1 and 4), which is the subject of the next part.

When the customer's accounts team calls weeks later to say the quantity did not arrive in full, the collections officer opens the invoice and finds the note attached: who received, when, where, how much was accepted, how much was refused, and a photo of the goods once unloaded. They send it in the same reply, and either the question is closed or it turns out the mistake was ours and it gets corrected. Either way, nobody searches through drivers' paperwork, and nobody waits a week.

What the Evidence Law says about a digital delivery note

Business owners ask this when the signature moves from paper to a screen: does this note count if a dispute reaches court? The Law of Evidence, issued by Royal Decree No. M/43 of 1443 AH, has a chapter on digital evidence. Article 53 defines digital evidence as any evidence derived from data created, issued, delivered, stored or communicated by digital means, provided it can be retrieved or obtained in an understandable form. Article 54 lists among its forms the digital record, the digital document, the digital signature, digital correspondence and digital media. Article 55 states that proof by digital evidence has the same standing as proof in writing under the law.

Most relevant in practice is Article 57: unofficial digital evidence is binding on the parties to the transaction, unless proven otherwise, in cases that include evidence obtained through a digital means specified in the contract under dispute. Article 58 places the burden of proving that digital evidence is not genuine on whoever claims so. In other words, the way you and your customer agree to confirm delivery deserves to be written into the contract or the terms of sale, not left as a habit agreed by word of mouth. How to word that clause, and what is enough in a particular case, are questions for your lawyer. Separately, Article 66, paragraph 1 of the VAT Implementing Regulations requires invoices, records and accounting documents to be kept for at least 6 years from the end of the related tax period, and a note attached to its invoice stays with it for as long as the invoice is kept.

The Origami view

When we build the delivery and invoicing workflow for a company, we start from how it proves delivery today: who signs at the customer, where the notes go after they are signed, how long passes between delivery and invoice, and who types the quantities. An invoice that had to be corrected after it was issued tells us where the current workflow breaks, before we draw a single screen.

Then we turn that into a workflow that runs on the phones of drivers, technicians and site supervisors: a delivery order or work order that opens on the phone; a confirmation that captures quantity, signature, time, location, photo and refusals with their reasons, even on a site with no signal, sending once the connection returns; an invoice draft built from the confirmed delivery; and a note attached to every invoice, all connected to your accounting system and e-invoicing. This is part of the custom systems we build through our services.

An exercise for this week: the last twenty invoices someone asked about

Before any system, you need a picture of what actually happens between delivery and invoice. This is an exercise for the finance manager and the operations manager in a single session:

• Pick the last twenty invoices that were paid late, that the customer queried, or that were corrected after issue.
• For each invoice, find the proof of delivery: a signed note, a completion sign-off, or an approved claim. Record how long it took to find and where you found it.
• Compare the quantity on the invoice with the quantity on the note, and record where the invoice quantity came from: the sales order or the note.
• Check who signed: are they among the authorized receivers in the customer record, and is their name legible?
• Count the days between delivery and invoice for each one.

The number of invoices whose proof you could not find within minutes, and the number whose quantities came from the sales order rather than the note, are the baseline for this part. The longest gap between delivery and invoice tells you where the note gets stuck on its way to the accountant.

In the next part

The invoice now has one source, the confirmed delivery, and its proof travels with it. The next part asks why payment still waits: the invoice that is issued late or reaches someone not authorized to approve it, the issuing deadlines in the Implementing Regulations, the monthly summary invoice, and correcting an invoice after issue with a credit or debit note rather than deleting it. Then the dispute log: every dispute gets an owner, a reason and a date, and the undisputed part of the invoice stays collectible.

Sources

• Zakat, Tax and Customs Authority: Implementing Regulations of the VAT Law (official Arabic text) — Article 53, paragraph 1(b) (latest date for issuing a tax invoice between businesses), Article 53, paragraph 5 (quantity and nature of goods or scope and nature of services, and the date of supply if it differs from the issue date), Article 54, paragraphs 1 and 4 (the credit note and its reference to the original invoice), and Article 66, paragraph 1 (keeping invoices, records and accounting documents for at least 6 years).
• Law of Evidence, Royal Decree No. M/43 of 1443 AH, Ministry of Justice legal portal (official Arabic text) — Articles 53 to 58 (definition and forms of digital evidence, its standing as proof in writing, the binding force of unofficial digital evidence on the parties, and the burden of proving it is not genuine).