How to dispute a 3PL invoice and ask for a credit
How to dispute a 3PL invoice: find your contract's deadline, build the evidence, write a calm credit request, follow up and keep the relationship intact.
To dispute a 3PL invoice, send your account manager a short written credit request before your contract's dispute deadline. List each disputed line with what was billed, what the contract allows and the difference, attach the proof, and ask for a credit by a set date. Stay factual and friendly: the person you write to probably did not create the error, and you want their help fixing it.
Step 1: Find your dispute window
Start by finding how long your contract gives you to raise a billing dispute. There is no standard number. Look in the payment or invoicing section for words like "dispute", "notice" or "deemed accepted". Here is how a few published fulfillment terms put it, at the time of writing (October 2026):
| Published terms | Dispute window | Notes |
|---|---|---|
| ShipBob terms of service | 30 days after the invoice date | Notices must be in writing; email counts as given when sent |
| DP World fulfillment dispute policy | Five business days | Written notice by email, with the invoice and supporting documents |
| Fulfyld docs | No hard cutoff stated | Recommends disputing within 30 days of the invoice date |
Your own contract is the only one that counts. Two details matter. First, is the clock measured from the invoice date or from when you received it? Second, does the contract say what happens if you miss the deadline? Some terms treat an invoice as accepted if no dispute is raised in time; Quiqup's terms, for example, give seven days from receipt. If the wording is unclear, have a lawyer review it.
Work out the date. Ridgeline Fulfillment, the made-up warehouse in our sample audit, gives 30 days from the invoice date. Its September invoice is dated October 3, so the last day is November 2 (28 days to October 31, plus 2).
If an audit turns up errors on older invoices that are already past the window, you can still ask. The warehouse may agree, but it does not have to, so lead with the invoices still inside the window.
Step 2: Build the evidence for each line
A dispute gets resolved fastest when the warehouse can check each finding in a minute. For every disputed line, collect:
- The invoice line: invoice number, row or page, date, description and amount.
- The contract term: the rate card line or clause, quoted word for word, with the amendment and its effective date if one applies.
- The proof: the Shopify order showing the item count or cancellation date, the storage report rows, or the earlier invoice with the same charge.
- The calculation: billed, expected, difference.
Here is one finding written that way, using made-up numbers:
Invoice RF-2026-09, pallet storage, September: billed 46 pallets × $18.00 = $828.00. Schedule A, note 1: "Storage is billed on the average number of pallets occupied during the calendar month." Your daily storage report for September totals 1,140 pallet-days over 30 days, an average of 38. Expected 38 × $18.00 = $684.00. Difference: $144.00.
Group findings by type, with a total for each and a grand total. Put the line-by-line detail in an attached spreadsheet rather than the email body.
Step 3: Separate certain findings from questions
Not every finding is equally solid. A rate that does not match the signed rate card is certain. A residential surcharge on an order to a business suite is likely but not certain, because UPS treats an address that could be either residential or commercial as residential (UPS).
Ask for credits on the certain findings and ask questions about the rest. Juniper & Pine's audit found $1,267.73. Of that, $72.10 was residential surcharges marked "likely", so the firm request was $1,267.73 − $72.10 = $1,195.63, with the surcharges raised as a question. That honesty makes the rest of your request more credible.
Step 4: Write the credit request
Use a short email. The 3PL credit request email template gives you a draft. A structure that works:
- Subject line with the invoice numbers, for example "Billing dispute: invoices RF-2026-07 to RF-2026-09". Some warehouses ask for a specific format, so check their policy.
- One line on why you are writing: you reviewed the invoices against the rate card and found charges that do not match.
- A short summary table: finding, clause, amount.
- The ask: a credit memo for the total, applied to the next invoice, and a fix to the setting that caused it.
- A date: ask for a reply within a set number of business days.
- The attachment: the line-by-line evidence.
On tone, write as if the error was a system setting, since that is the easiest explanation for the warehouse to accept. Avoid words like "overcharged you on purpose". Do not threaten to leave in the first email. You want the account manager to forward your email to their billing team without having to rewrite it.
Step 5: Decide what to pay
Check your payment clause before you hold anything back. Contracts can require you to pay the undisputed portion on time. One sample clause collected by Law Insider reads, in part: "If Buyer only disputes a portion of the invoice Buyer must pay the undisputed portion". Some fulfillment terms also let the warehouse charge interest on late balances, suspend service or withhold your goods for unpaid amounts. ShipBob's published terms include each of these (ShipBob).
Withholding the whole invoice can put your inventory at risk. Paying the undisputed amount and asking for the rest as a credit is the lower-risk path, but have a lawyer review your contract if a large amount is involved.
Step 6: Follow up and confirm the fix
If you hear nothing by your date, send one short reminder with the original email attached. When the warehouse agrees:
- Get the agreed amount in writing.
- Check that the credit memo actually appears on the next invoice. One 3PL's docs say approved credits go on the next invoice or follow the billing agreement (Fulfyld).
- Confirm the cause is fixed: the new rate entered, the storage basis changed, the markup corrected.
- Check the next invoice for the same error. A setting that was wrong once is easy to set wrong again.
If they reject a finding, ask which record they relied on. Sometimes they have a document you do not, such as an approved special project, and the finding goes away. Sometimes the conversation shows the contract wording is unclear, which is worth fixing at renewal. Our 3PL contract checklist covers the clauses to tighten.
Keep the relationship working
A credit request handled well can improve the relationship. The warehouse learns you read your invoices, and you both end up with a cleaner rate card. A few habits help:
- Raise issues monthly, not as a big list after a year.
- Thank them when credits come through.
- Ask for itemized detail with carrier cost on every invoice, so future checks are quick.
For finding the errors in the first place, see how to audit a 3PL invoice and common 3PL billing errors.
Get a credit request ready to send
3PL Checker audits your invoices against your rate card and Shopify orders, and gives you the evidence plus a credit request you can send yourself. It never contacts your warehouse. The first audit is free.
Questions
How long do I have to dispute a 3PL invoice?
It depends on your contract. Published terms vary, for example five business days in one and 30 days after the invoice date in another, so check your agreement and send disputes in writing before the deadline.
How do I write an invoice dispute letter?
Keep it short and factual. Name the invoice, list each disputed line with what was billed, what the contract allows and the difference, attach the evidence, and ask for a credit by a specific date.
How do I ask a 3PL for a credit?
Email your account manager with the disputed lines, the contract clause for each, the proof and a total, and ask for a credit memo on your next invoice. Our credit request email template gives you a starting draft.
Should I pay a 3PL invoice I am disputing?
Check your contract first. Contracts can require the undisputed part to be paid on time, and some let the warehouse suspend service or hold goods for unpaid invoices, so have a lawyer review the terms if you plan to withhold anything.