Definition
A rate confirmation (often “rate con”) is the written document or record that locks the price and terms for a shipment or lane: origin and destination, equipment, validity, currency, free time, and how accessorial charges are handled. It is the commercial anchor of the three-way match with the CFDI and Carta Porte, and with trip evidence (proof of delivery or GPS).
If the price only lives in a chat thread, you do not have a rate — you have an opinion that is hard to defend weeks later.
Pre-pay audit starts when the price is recorded, versioned, and tied to the shipment.
What it means on Mexico–US lanes
On bilingual corridors the document is called a rate confirmation. In many Mexican companies it arrives as a signed PDF, an email, or — often — a WhatsApp screenshot. Format matters less than three conditions: it exists in writing, it is filed with the shipment ID, and accounts payable can retrieve it at payment time.
It does not replace the master agreement with the carrier or intermediary, the bill of lading, or the CFDI. Each piece answers a different question: the rate confirmation answers “how much we pay for this trip, under which rules”.
Why it matters (shipper, 3PL, and carrier)
The same sheet protects three sides. When it is missing, each side loses differently.
Shipper
What a clean rate con buys: Price and accessorial rules agreed before the trip
What you lose without it: Late disputes and surprise charges with no written base
3PL / broker
What a clean rate con buys: Clear terms toward the carrier and toward the customer
What you lose without it: Getting stuck between a rate or detention disagreement
Carrier
What a clean rate con buys: Payment commitment and negotiable extras before signing
What you lose without it: Verbal promises that never get paid at invoicing
Accounts payable
What a clean rate con buys: Anchor to match invoice, tax docs, and evidence
What you lose without it: Paying blind or holding without a documented reason
What it includes: fields that cannot be missing
If a key field is not written, it effectively does not exist in a dispute. Before accepting the load (or releasing payment), check at least this:
Reference / load ID
What it should say: Unique shipment or load number
Why it matters: Ties rate, invoice, and evidence
Lane and appointments
What it should say: Origin, destination, windows or appointments
Why it matters: Prevents “I arrived on time” debates
Equipment and commodity
What it should say: Unit type, weight or description
Why it matters: Affects price, permits, and insurance
Rate and currency
What it should say: Base amount; per trip, km, or weight; MXN or USD
Why it matters: Anchor for freight payment
Free time and accessorials
What it should say: Free time, detention, empty miles, stops; what needs prior authorization
Why it matters: Without this, extras are open to interpretation
Payment terms
What it should say: Timeline (for example, net 30) and docs required to get paid
Why it matters: Clarifies when and with what payment releases
1.Prior authorization for extras
If detention, empty miles, or a border delay charge needs notice or approval, write it down. A phone promise will not support a hold or a claim.
2.All-in vs breakdown
An opaque “all-in” hides empty miles and detention inside the linehaul. Prefer base line + accessorial rules, or an all-in that explicitly lists what is included.
What it is not (and what not to confuse it with)
Mixing up documents is the fastest way to argue about the wrong paper.
Rate confirmation
- Trip price and rules
- Between payer and broker/carrier
- Commercial match anchor
Bill of lading
- Cargo receipt and condition
- Travels with the freight
- Cargo and claims anchor
1.Not the master agreement
The broker–carrier (or commercial) master agreement sets liability, insurance, and general rules. The rate confirmation sets the specific load; it does not replace the master.
2.Not a loose quote
A quote or response to a request for pricing can be earlier. The rate confirmation is the load agreement (ideally signed or accepted) that accounts payable will use at payment time.
3.Not the CFDI or Carta Porte
The CFDI and Carta Porte document the move for Mexican tax and operational purposes. The rate confirmation says how much to pay; the CFDI documents the billed service.
How it is used on Mexico–US lanes
On the U.S. side, a signed rate con between broker and carrier is industry standard. In Mexico the equivalent may be called a service-and-rate confirmation, an assignment email, or simply “the trip rate.” The useful test is not the name: it is whether accounts payable can retrieve it in seconds when the invoice arrives.
On border crossings, anchor rate by leg when the move is split (pickup, crossing, delivery). A single opaque all-in without legs or border-delay rules is fertile ground for dispute. Related: transload vs through-trailer at the border and the accessorials guide.
When the trip touches Mexican territory, a complete file usually needs rate confirmation + CFDI with Carta Porte complement (when applicable) + proof of delivery (POD). OCL is not an Authorized Certification Provider (PAC) and can stamp CFDI: the value is matching what you already issued or received.
Three-way match before paying
The pattern that sustains pre-pay audit is simple: what was agreed, what was invoiced, and what happened must line up.
1.If the invoice does not match the rate
Hold with a written reason (amount, lane, currency, or unauthorized extra) and request a correction or credit note. Playbook: freight accounts payable.
2.If there is a CFDI but no filed rate
You are paying a tax document without a commercial anchor. Recover the confirmation or escalate to the lane owner before release.
Anchor the rate
Trip file copy
Receive CFDI
Validate UUID + CP
Close evidence
POD or GPS
Exception
Hold with cause
Common mistakes and disputes
1.Price only in WhatsApp or a call
Weeks later nobody can prove the deal. File the thread or PDF with the shipment ID the same day.
2.Opaque all-in
Empty miles, detention, or border delay are “understood as included” until someone bills them separately — or the carrier says they were never included.
3.Verbal extras
“We’ll cover detention” that never makes the rate con is weak ground to bill or to pay. Negotiate before signing; afterward, require a written amendment.
4.Mixing dry-run and cancellation fees
Canceling an already-ordered truck may trigger falso flete or Truck Ordered Not Used (TONU). The rule and percentage belong in the contract or rate confirmation — not in “custom”.
5.Mid-trip changes without a new version
If destination, stop-off, or rate changes, issue a new confirmation or amendment. Running on the old version guarantees the invoicing fight.
How it ties to accessorials, POD, and CFDI
The rate confirmation does not live alone. It is the commercial piece of the file; the other pieces close tax and evidence.
1.Accessorials
Detention, layover, fuel, border, and cancellations are defended or rejected against what the rate con says. Hub: freight accessorials · glossary: what are accessorials.
2.Proof of delivery (POD)
Without POD (or equivalent GPS), accounts payable cannot confirm the billed service happened. Practical convention: POD guide for shippers.
3.CFDI and Carta Porte
In Mexico, the tax match runs through Mexico freight tax and CFDI + Carta Porte + GPS + POD audit. The rate does not replace the XML; the XML does not replace the rate.
4.Agents and brokering
When an intermediary or agent is in the middle, the rate confirmation clarifies who quoted, who hauls, and at what price. See freight agents.
OCL and the trip file
OCL helps require a rate record per shipment, file it in the trip dossier, and match it against invoice, CFDI/Carta Porte, and evidence before pay. It can stamp invoices and Carta Porte; it does not replace your commercial contract.
Useful pattern: agents or rules flag the exception (missing rate, wrong amount, unauthorized extra); a person decides hold or release. It can coexist with your current TMS without a day-one migration.
Sources and further reading
- Accessorials hub: freight accessorials for shippers and 3PLs.
- POD: what is POD · POD convention for shippers.
- Tax: Mexico freight tax.
- Audit: CFDI + Carta Porte + GPS + POD.
- Accounts payable: freight pre-pay audit.
- Agents: what are freight agents.
- Sibling: falso flete.
Key takeaways5 points
- Rate confirmation = written record of price and terms for a shipment or lane before the freight moves.
- Without that record tied to the shipment ID, accounts payable cannot match the invoice to the commercial agreement.
- Minimum Mexico–US match: rate ↔ CFDI and Carta Porte ↔ proof of delivery (POD) or GPS.
- What is not written (detention, empty miles, cancellation) is rarely settled cleanly: someone loses or pays blind.
- OCL does not sign the deal for you: it helps require, file, and match the record in the trip file before pay.
Want to anchor rates before paying?
Frequently asked questions
The written record of price and terms for a shipment or lane before execution: origin/destination, equipment, currency, free time, and accessorial rules. In Spanish it is often called confirmación de tarifa.
Once the parties accept or sign it, it typically operates as the load-specific agreement (alongside the master contract). Exact enforceability depends on wording and applicable law; in practice it is the commercial evidence accounts payable and the carrier use in a rate dispute.
As weak evidence, sometimes. As a system, no. If the deal started in chat, archive it with the shipment ID (PDF or export) the same day; if it is not retrievable at payment time, for accounts payable it barely exists.
The rate confirmation sets trip price and payment rules. The bill of lading documents the cargo, its condition, and the contract of carriage. One governs freight pay; the other governs the goods.
The rate says how much to pay per the agreement. The CFDI with Carta Porte (when applicable) documents the move for Mexican tax purposes. Accounts payable should match both to real trip evidence.
The sound operating rule is to hold or dispute until you see prior authorization or a written amendment. Without a base in the rate confirmation or contract, the extra should not be paid “by custom”.
It can capture, require, and match the record inside the operation. The commercial agreement remains yours with the carrier or intermediary. OCL can stamp invoices and Carta Porte.