
Buster Fetcher® checks every Canada Post invoice for billing errors, like a billed weight far above what you declared, and every guaranteed parcel for late delivery. We claim late refunds for you. Billing errors come to you flagged, with the proof and the amount, ready for you to claim.

Most shippers leave money with the carrier without realizing it. Here's where Buster Fetcher gets it back.
Reweighs, address corrections, surcharges that shouldn't apply, fuel miscalculations, Saturday fees on weekdays, and more. We audit every line.
Canada Post guarantees Xpresspost, Priority, and Expedited Parcel. When a parcel misses the promise, the shipping cost is yours to get back. We catch every eligible parcel.
A billed weight far above what you declared. A signature or COD fee you may not have asked for. We show you each one, and you confirm.
Xpresspost, Priority, and Expedited Parcel come with a delivery guarantee. About 1 in 10 arrives late, and every late parcel is yours to claim. Most shippers never file because tracking parcels by hand isn't realistic.


Carrier invoices are full of errors that are almost impossible to catch by hand. Billed heavier than you declared. A Saturday fee on a parcel delivered on a weekday. A fuel rate that doesn't match what Canada Post published that week. Buster Fetcher reads every line and flags what doesn't add up.
Refunds apply to guaranteed services only. Here is where Canada Post commits to a delivery date.
Xpresspost, Priority, and Expedited Parcel all carry a money-back guarantee from Canada Post. Buster Fetcher tracks every parcel on every service so you always know what you're owed.
Canada Post updates its services, delivery promises, and guarantee policies from time to time. For the most current information, check the Canada Post website or contact us and we'll confirm the latest. Canada Post, Priority, Xpresspost, Expedited Parcel and Regular Parcel are trademarks of Canada Post Corporation.
Buster Fetcher audits Canada Post invoices line by line across more than 20 types of errors and surcharges. Here are the most common ones, by category.
Weight
Flagged
Billed weight
3.5 kg
Real weight
2.0 kg
You paid for weight your parcel didn’t have.
Surcharges
Flagged
Address correction
$7.00
Original address
Valid
The address was right. The fee shouldn’t be there.
Weight
Flagged
Billed (÷ 5000)
4.8 kg
Regular Parcel (÷ 6000)
4.0 kg
Wrong formula for the service. Higher bill.
Service
Flagged
Saturday delivery
Charged
Delivered on
Tuesday
Billed for Saturday. It arrived on a weekday.
Surcharges
Flagged
Rate on invoice
21.50%
Published rate
19.25%
Canada Post posts the rate every Monday. Yours didn’t match.
Weight
Flagged
Oversize surcharge
Charged
Parcel size
Under the limit
Charged as oversize when it wasn’t.
Service
Flagged
Signature option
Charged
Used on your account?
No
You don't use signature. You paid for it anyway.
Billing
Flagged
Invoice of Mar 10
Parcel #4471
Invoice of Mar 3
Parcel #4471
Same parcel, billed on two invoices.
Surcharges
Flagged
Oversize, peak rate
$400
Regular rate
$300
Peak pricing, billed after the peak window closed.
Service
Flagged
Collect on delivery
$7.25
Requested?
No
You never asked for collect on delivery.
Examples are illustrative.
Canada Post measured your parcel as heavier than what you declared and billed you the difference. Sometimes the reweigh is wrong.
Canada Post uses a 5000 cm³/kg divisor for these services. If the math doesn't match, you've been overcharged.
Regular Parcel uses a 6000 cm³/kg divisor. Mixing it up with Priority's formula leads to overcharges.
Canada Post charges Oversize when a parcel passes set dimension thresholds. Sometimes the classification gets applied to parcels that don't qualify.
A residential delivery fee billed on an address that should have been classified commercial.
Canada Post bills around $7.00 to 'correct' an address. If the original address was actually valid, the fee is recoverable.
Canada Post publishes a fuel rate every Monday. When the rate billed on your invoice doesn't match the published rate, you've been overcharged.
Canada Post bills $2.00 for tube-shaped parcels. Billed on a parcel that isn't a tube, it's recoverable.
Canada Post raises existing surcharges (like Oversize $300 → $400) during peak. When the peak-priced surcharge gets applied outside the peak window, it's an overcharge.
Canada Post charges $7.25 for collect-on-delivery. Billed when you didn't request the service, it's recoverable.
A Proof of Age fee billed higher than Canada Post's published rate.
A Signature Required fee billed when you've told us you don't use signature.
A Saturday surcharge billed on a parcel actually delivered on a weekday.
Your contracted rate quietly creeping up over time without notice. Catching it early gives you leverage to push back.
The same parcel billed more than once across invoices or months.
Currency conversion or rate-card mismatches that lead to incorrect totals on cross-border shipments.
Parcels manifested from a postal code not registered on your account. Usually a sign of an error or unauthorized usage.
A service tier or destination that doesn't match your account agreement.
Patterns in your account activity that don't fit your normal shipping profile. Worth a second look.
We connect securely to your Canada Post account. Our team guides you through setup.
We watch every parcel and every invoice line, 24/7. Nothing gets missed.
We file late-delivery claims for you. Billing errors come to you with the proof and the amount, ready for you to claim. Refunds and credits land back in your account.
We know Canada Post's services, surcharges, and quirks because we ship from here too. Bilingual support in English and French.
Most tools do refunds or invoice audits. We do both, and they share the same data so nothing slips through.
Keep the Canada Post account you already have. Nothing changes in how you ship.
We spot every late parcel on a guaranteed service and file the claim for you. Billing errors come to you flagged, with the proof and the amount, ready for you to claim.
We connect securely to your Canada Post account, and our team guides you through setup.
Refund timing depends on Canada Post's processing window, but we start filing claims as soon as we detect eligible parcels. You'll usually see the first ones in the first invoice cycle after you connect.
Xpresspost™, Priority™, and Expedited Parcel™ are the three services with a money-back guarantee. Regular Parcel™ has estimated delivery dates only and doesn't qualify.
You have 30 business days from the promised delivery date for late delivery refunds, and 90 days for billing errors. In peak season, a parcel must be at least 2 business days late to qualify. We file late claims automatically, and flag billing errors early so you have time to claim them.
No. We work within Canada Post's normal claim process, the same one available to any account holder. Your relationship with Canada Post stays exactly as it was.
Yes, within the carrier's claim windows. We can usually look back across recent invoices for billing errors. The further back you go, the more likely some claims have already passed their deadline.
You don't switch carriers. You keep your Canada Post account. Late delivery refunds are month to month, and you can cancel anytime. Shipping Monitor is a one-year contract, paid for the year up front or monthly. It runs for the full year.
More than 20 types, from reweigh overcharges and address correction fees to fuel surcharge mismatches and duplicate billing. The most common ones are listed on this page.
Free Canada Post diagnosis. No account changes. No commitment.