How to check 3PL accessorial charges against the work actually done

Why unsupported accessorials matter#

Unsupported accessorials are easy to miss: the lines are irregular, can be small, and some show an amount with no quantity. On a 3PL rate card, an accessorial is a charge for warehouse work outside the standard receiving, storage, pick-and-pack and shipping rates; carriers use it for charges beyond basic pickup and delivery⁴.

At least one inbound penalty (for appointments, paperwork or non-conforming freight) appeared under about a third of Implentio customers' 3PL contracts with receiving charges, and order cancellation fees under about one in seven of those with outbound fulfillment charges. These are minimum shares, since a fee can sit in a contract and never be triggered, and they count contracts billed the fee, not errors. Other errors are in The 25 most common 3PL billing errors and how to spot each.

Why a 3PL bills an accessorial with nothing behind it#

Most 3PL billing errors are process failures. They're rarely intentional, and they happen with good 3PLs. Five mechanisms can put an accessorial on the invoice with no billable work behind it:

• A billing rule fires on a field, status or time. One billing system's help pages describe rush fees that fire on text such as "Order Rush Fee" in a reference field⁵ or on orders processed after a cutoff time the 3PL sets, which applies only on the day of creation⁶. Another vendor's guide shows a cycle-count fee rule with no filter on who asked⁷.
• A fee keyed by hand, with a quantity and date the biller chooses⁸, or after a system flag prompts staff to "review and apply" one⁹.
• A standing add-on left on. Billing tools can repeat a charge every period^10,8.
• A rule that differs from your contract. Billing can be customized per client⁷, so a configured trigger can differ from the contract's.
• Work the 3PL caused, or did for itself, billed as if you asked for it.

For general causes, see Why 3PL billing errors happen, and why they keep coming back.

Five ways an accessorial can lack support#

An accessorial can carry the right rate and still lack support in five ways, each with legitimate causes to rule out first.

Unbilled work is the reverse case: see Not every variance is an overcharge: undercharges, manual items and special projects.

What proof to ask for, fee by fee#

For each accessorial, ask the 3PL for the event record behind the line and match it to a record you hold. A 3PL record that agrees with its own invoice is a tie-out: it proves the arithmetic, not the charge. Each fee is defined in its linked article and in The complete list of 3PL accessorial fees (40+), with what each covers.

A contract can let product disposal proceed after an unanswered notice¹², so a missing authorization is a question first.

How to check accessorial charges, step by step#

You need your invoices, the detail file, your contract and a spreadsheet:

1. List every accessorial line from every invoice section, with quantity and unit. Hourly projects and lump sums belong to Checking manual and one-off line items.
2. Find each fee's trigger, unit and approval rule in the contract or card. If your card lists a fee but nothing says what triggers it, the 3PL will apply its own rule, usually the one set up in its billing system, and that's hard to dispute after the fact. Ask the 3PL to write down the trigger, the unit and who decides it happened, and agree that the definition applies from the next invoice. For charges already billed, ask how the rule was applied; if it contradicts something the 3PL told you in writing, dispute it inside the window. See Fees you should never accept without definition.
3. Ask for event-level backup: date, reference (order, PO, work order or ticket), quantity, reason and approver. See The supporting detail files you should always request.
4. Match each event to a record you hold. Under the IWLA standard contract terms, where a contract adopts them, the warehouse's system is "the system and inventory of record"¹; for requests, bookings and authorizations, your emails, tickets and exports are the independent record.
5. Test the quantity on the unit your card states for that fee, including any minimum increment or minimum per request.
6. Test the trigger: the event's time against the cutoff or release point, who asked, and who caused it.
7. Look for repeats. An accessorial billed at the same quantity every month, for work that should vary, is worth a question. It's legitimate when it's a scheduled service you still want, such as a weekly count program or a standing insert.
8. Log each line as supported, unsupported, question or undercharge, and raise the rest inside your dispute window.

This expands step 7 of How to audit a 3PL invoice, step by step; for orders and storage, see Activity verification: did the billed activity actually happen?

What to do when a charge has no support#

Ask in writing for the event record; if none exists, ask for a credit or corrected invoice. Pay the undisputed part on time; if your 3PL charges a card or drafts your account, check as soon as the invoice arrives. A 30-day dispute window is common; 14 days is short. Windows can run from about a week to a few months, and the clock usually starts when the invoice carrying the charge lands, not when the work happened.

Ask for a fix for the cause, such as a corrected billing rule or an add-on switched off. To stop an add-on, ask in writing to switch it off and for the 3PL to confirm the date. Work done before that date because nobody asked to stop it is usually billable; charges after it, or on orders that didn't get the add-on, aren't supported. If the credited fee counts toward a monthly minimum you're under that month, ask for the credit to be applied after the shortfall is calculated. See How to dispute a 3PL invoice: process and etiquette.

What good looks like#

A well-run accessorial schedule lets you check each line from the invoice and your records:

• A definition for every fee: name and aliases, trigger and who decides it happened, unit, rate, includes and excludes, the approval or notice rule for on-request work, and the evidence the invoice will show (quantity, unit, date, reference).
• A written rule on who pays for 3PL-caused rework and which counts are billable.
• Approval rules that match the fee schedule. One filed contract requires unlisted services to be agreed in writing first, yet lists an hourly line for "additional warehouse services not outlined"².
• A yearly review of active add-ons.