A credit request email that gets honored has four things in it: the invoice number, the line in question, the document that proves what the price or quantity should have been, and the exact dollar amount you are asking for. That is it. No argument, no history, no tone. Attach the proof, name the number, ask for an account credit rather than a refund, and send it the same week the invoice landed.
Most credit requests fail for reasons that have nothing to do with whether the contractor was right. They go to the wrong person, they leave out the invoice number, they make a case instead of showing a document, or they arrive two months late. Your rep is not evaluating your argument. Your rep is deciding whether they can paste your email into a credit memo request and have it approved without doing research. Make that easy and most recent errors just get fixed.
Below is what actually stops these from getting honored, who to send them to, how fast, what to attach, and five copyable templates for the five situations that produce almost every credit request in the trades. If the underlying problem is that the same part keeps costing more with no notice, that pattern has its own name and its own explainer: material price creep.
Why most credit requests get denied
Six failure modes, in rough order of how often they sink an otherwise valid request.
It went to the wrong person. Your outside sales rep does not process credits. Neither does AR, usually, until someone inside sales or a branch manager authorizes it. An email to the wrong desk does not get forwarded, it gets read and set down.
No invoice number. A distributor’s system is organized around documents, not around conversations. “The copper fittings we bought a couple weeks back” is not a searchable object. An invoice number is.
It argues instead of documenting. Three paragraphs explaining why the price should have been lower is work for the reader. A quote number with an attached PDF is not. The person on the other end has to justify the credit to someone, and what they need is a document, not your reasoning.
It is too late. More on this below, but this is the single biggest killer of legitimate claims.
It asks for a refund. A refund is a check run, a different approval path, and often a policy problem. One published distributor return policy states plainly that it issues no cash refunds on returns. An account credit is a credit memo, which a branch can issue and which then offsets a future payment to the same vendor. If you buy from this house every week, the credit is worth the same to you and moves several times faster.
It is vague about the amount. If you make the reader do the arithmetic, the request sits. Do the arithmetic yourself: unit price billed, unit price owed, quantity, difference. Show the line.
Who to actually send it to
There are four people who could receive this, and they do different jobs.
Inside sales, counter, or your branch’s order desk. This is your default recipient for anything under a few hundred dollars on a recent invoice. They wrote the order, they can see the quote, and at most branches they can issue the credit memo or push it straight to the person who can. Send here first.
Your outside sales rep. Copy them, do not address them. Your rep is the person who owns your pricing agreement, and pricing errors are their problem to fix at the source. But they are in a truck. Making them the primary recipient adds a day and a hop. The exception: contract pricing errors, which are a pricing-file problem rather than an order problem, and which your rep genuinely does need to fix so it does not repeat.
The branch manager. Escalate here after one week with no response, or when the same error has now happened twice. Do it by forwarding your original email with one line on top, not by rewriting the complaint. The forwarded thread shows the date you first asked, which is the whole point.
Accounts receivable. AR is for what happens after the credit is approved: applying it, correcting a statement, releasing a hold. Do not open with AR. They cannot authorize a price adjustment and will route you back.
One more rule: send credit requests from your own email address, from your own domain, in your own name. This is a request between two businesses that do a lot of business together, and it should read that way.
The timing reality
Two different clocks are running, and contractors usually only know about one of them.
The return window. This governs physical goods going back. Published distributor policies require prior approval before any return, and the goods have to be unused, undamaged, and in the manufacturer’s original carton. Some categories are excluded outright: wire cuts, non-stock items, special and custom orders are commonly final sale. If you are asking for a restocking fee waiver or a return authorization, you are on this clock and it is short.
The billing dispute window. This is softer and nobody publishes it, but it is real, and it is the one that matters for pricing and quantity errors. The pattern is simple: the fresher the invoice, the fewer systems have touched it. A billing error caught before the invoice posts to a closed period is an edit. The same error caught after the month closes is a credit memo that has to be justified, and after a quarter it is an argument about whether it happened at all. Published AP practice on the receiving side runs to a similar rhythm: one institutional credit memo policy escalates to vendor contact at 45 days and to collections at 90.
The practical consequence: a same-week request reads as housekeeping. A same-quarter request reads as an audit. Same error, same dollar amount, completely different reception. If you take one thing from this post, take that.
That is also the argument for checking invoices when they arrive rather than when you have time. There is not a lot of money in catching a $40 error. There is real money in catching it inside the week, every week, on every invoice.
What to attach
Nothing you write is as persuasive as one attachment. The reason is structural: the distributor may be filing its own claim upstream, and rebate and SPA reimbursement claims are themselves supported with invoices and proof of delivery. Documents are the currency of that entire chain. Standard AP practice on a mismatch is exactly this: withhold payment and request a corrected invoice or a credit note, with the supporting document attached.
| Situation | Attach | Send to | Expected turnaround |
|---|---|---|---|
| Price does not match a written quote | The quote PDF and the invoice, quote number highlighted | Inside sales, copy your rep | 1 to 3 business days |
| Price does not match contract pricing | The invoice plus two or three prior invoices showing the correct price | Your outside rep, copy inside sales | 3 to 10 business days |
| Duplicate invoice | Both invoice PDFs plus the check number or ACH date that paid the first | AR, copy inside sales | 2 to 5 business days |
| Short shipment or wrong quantity | Signed packing slip or a photo of the counter ticket, plus the invoice | Inside sales or the counter | 1 to 3 business days |
| Restocking fee waiver | The RMA or credit memo, the original invoice, and the order confirmation | Branch manager, copy your rep | 3 to 7 business days |
| Freight or surcharge line you did not agree to | The quote or order confirmation showing agreed freight terms | Inside sales | 2 to 5 business days |
A photo of a crumpled counter ticket taken on a phone is a valid attachment. It has a date, a branch, a ticket number, and quantities on it. Nobody is going to reject it for being wrinkled.
Five templates
Each of these is short on purpose. Length reads as uncertainty. Every one asks for an account credit, names a dollar figure, and points at an attachment.
Price discrepancy against a written quote
Subject: Credit request, invoice #388102, line 4 vs quote #Q-2241
Hi [name],
Invoice #388102 (dated [date], PO [number]) bills line 4, 3/4" copper
90 elbow bag of 10, at $17.80 each for 8 bags. Quote #Q-2241 for the
same job lists that item at $14.20. Quote and invoice are attached.
Difference is $3.60 x 8 = $28.80. Could you issue an account credit
for $28.80 against invoice #388102?
Thanks,
[name], [company]
Account #[number]Why it works: it names both documents by number in the subject line, so the request is searchable before anyone opens it. This is the highest-frequency error in the trades and the easiest to prove. The mechanics of how quotes and invoices drift apart are covered in quote vs invoice mismatch.
Price discrepancy against contract pricing
Subject: Contract price not applying, account #[number], invoice #51188
Hi [name],
Invoice #51188 bills 12/2 Romex, 250 ft roll, at $104.50. We have been
billed $89.00 on this item on invoices #50412, #50877 and #51002, all
within the last 60 days. Those three are attached alongside #51188.
Looks like the contract rate did not apply on this order rather than
anything changing on purpose. Asking two things:
1. An account credit for the difference, $15.50 x 6 rolls = $93.00.
2. A check that the contract price is still loaded on the account, so
the next order picks it up.
Thanks,
[name], [company]Why it works: it treats the error as a lookup failure rather than an accusation, which is almost always what it actually is, and it asks for the underlying fix as well as the money. Why the two numbers exist at all is explained in contract price vs counter price, and how the discount structure behind them is built is covered in column pricing at distributors.
Duplicate invoice
Subject: Possible duplicate, invoices #52110 and #52346, account #[number]
Hi [name],
I think we have been billed twice for the same delivery. Invoice
#52110 (dated [date]) and invoice #52346 (dated [date], three weeks
later) carry identical line items, quantities and totals, $612.40.
Both attached.
#52110 was paid on [date], check #[number]. If you agree #52346 is a
re-issue, could you void it or credit the account $612.40?
Happy to be wrong on this if there was a second delivery. Let me know
either way.
Thanks,
[name], [company]Why it works: the last line gives the reader an easy exit if a second delivery really happened, which costs you nothing and removes any need for them to be defensive. How duplicates get created in the first place is covered in how to catch a duplicate supply-house invoice.
Short shipment or wrong quantity
Subject: Quantity credit, invoice #47903, line 2
Hi [name],
Invoice #47903 bills 12 of item [SKU]. Our signed packing slip for
that delivery, ticket #[number], shows 10. Photo of the slip attached
with invoice #47903.
Asking for an account credit for 2 at $48.00 = $96.00. We do not need
the other two shipped, that job is closed out.
Thanks,
[name], [company]Why it works: it settles the ship-or-credit question in one line, which is the follow-up email that would otherwise cost you three days.
Restocking fee waiver request
Subject: Restocking fee waiver request, credit memo #[number], RMA #[number]
Hi [name],
We returned 4 of item [SKU] on RMA #[number], unopened and in the
original cartons, four days after pickup. Credit memo #[number] came
back with a 25% restocking charge of $112.00.
The over-order came from a revised drawing on our end, not from a
picking error, so I understand the fee is policy. Asking whether the
branch can waive it this once given the material went straight back on
the shelf inside a week. If a partial waiver is easier to approve,
that works too.
Original invoice and the RMA paperwork are attached.
Thanks,
[name], [company]Why it works: it concedes the fee is legitimate before asking, names its own mistake, and offers the reader a smaller yes. Published policies commonly run a minimum 25% restocking fee with wire cuts and non-stock items excluded from returns entirely, so this is the one template where you are asking for a favor rather than a correction. What distributors can and cannot charge on a return is covered in supply house restocking fees.
The tone that works with a house you have bought from for years
You are not writing to a stranger. You are writing to a branch that pulls material for you at 6:45am and floats you thirty days. The goal is to get your money back and still be the account they like.
Three things carry all of it.
Attribute errors to systems, not people. “The contract rate did not apply” is both more accurate and more effective than “we were overcharged.” Pricing errors are usually a record that did not join, a quote that expired, or an order entered against the wrong account.
Ask, do not demand. “Could you issue an account credit for $28.80” gets the same result as “please correct this immediately” and costs you nothing.
Never threaten to move the account over a line item. A $28.80 credit request is not the venue. If your pricing has genuinely drifted, that is a scheduled conversation with your rep, with twelve months of unit prices on the table, not a footnote in a billing email.
And send the thank-you when it clears. One line. The person who processed your credit memo is the person who will process the next one.
The short version
- Check invoices the week they arrive, not the month they arrive. Timing beats every other factor.
- Send to inside sales or the counter first. Copy your outside rep. Escalate to the branch manager after a week by forwarding the original thread.
- Always include: invoice number, line item, the correct number, the wrong number, the quantity, and the total you are asking for.
- Attach the proof. Quote, packing slip, prior invoices, or a phone photo of the paper ticket.
- Ask for an account credit, not a refund.
- Keep it under 120 words and free of argument.
- Say thanks when it posts.
Sources
- Colonial Electric Supply return policy (minimum 25% restocking fee, no returns on wire cuts or non-stock items, no cash refunds)
- Main Electric Supply return policy (prior approval required, non-stock and special-order items final sale, goods must be unused and resalable)
- Miami University accounts payable credit memo policy (credit memos offset a future payment to the same vendor; 45-day and 90-day escalation)
- BILL, three-way matching (standard mismatch response: withhold payment and request a corrected invoice or credit note)
- Tipalti, three-way match (invoice matching tolerances and named mismatch failure modes)
- Stampli, three-way invoice matching (invoice, purchase order and delivery receipt cross-check)
- Vendavo, SPA pricing and rebate execution (distributors file reimbursement claims supported by invoices and proof of delivery)