Purolator vs Canada Post: Which Delivery Guarantee Actually Pays You Back

Two Guarantees, Two Very Different Sets of Rules

Canada Post and Purolator both back their faster services with an on-time delivery guarantee. On the surface they sound the same. In practice, what you get back, and how long you have to claim it, are not close to equal, especially after Purolator changed its terms in 2026.

If you split volume between the two carriers, which a lot of Canadian sellers do, it is worth understanding exactly what each one owes you. The differences decide how much money you can actually recover and how easy it is to lose a claim to a missed deadline.

What Gets Refunded

This is the biggest gap between the two, and it opened up in 2026.

Canada Post still refunds the full shipping charge when a covered shipment arrives late. You paid for Priority or Xpresspost, it missed the standard, you get the postage back in full as a credit.

Purolator changed its rule on March 30, 2026. A late guaranteed shipment now refunds or credits 50 percent of the service rate plus taxes, not the full amount. Additional charges and customs fees are excluded, as they were before. So on a late Purolator Express shipment, you now recover roughly half of what the equivalent Canada Post refund would return on a same-priced shipment.

The headline: Canada Post pays back more per late shipment in 2026. Purolator's guarantee is now a half-refund.

Which Services Are Covered

Canada Post applies its On-Time Delivery Guarantee to Priority, Xpresspost, and certain international express services. It does not cover Expedited Parcel, Regular Parcel, or Lettermail. If you ship a lot of Expedited or Regular to save money, most of that volume carries no guarantee at all.

Purolator covers a broader band of express courier services, including its Express and Express Envelope commitments. It does not cover Purolator Ground Standard or Purolator Freight. If your time-sensitive parcels move on Purolator Express, the guarantee applies often.

So Purolator guarantees a wider slice of its service menu, while Canada Post pays more on the services it does guarantee. Which matters more depends entirely on which services you actually use.

The Claim Deadline

This is where claims quietly die, and the two carriers are not the same.

Canada Post gives you 30 business days from the expected delivery date to file. That is a relatively forgiving window, though high-volume shippers reviewing invoices monthly can still run into the edge of it on early-month shipments.

Purolator is far tighter. Account customers have 15 calendar days from the original invoice date. Calendar days, not business days, and measured from the invoice, not the delivery. If you reconcile invoices once a month, a large share of your Purolator shipments are already out of bounds before you even start looking.

If you take one thing from this comparison, make it this: Purolator claims have to be caught fast, and a monthly review cycle is usually too slow to catch them by hand.

How You File

Canada Post uses a service ticket. There is no instant self-serve dispute button. You submit your customer number, the tracking number, the ship and expected delivery dates, and proof the delivery was late, then wait for an internal review, typically 5 to 15 business days.

Purolator handles account claims by phone. You call the number on your invoice with your Bill of Lading number and request the guarantee refund against the specific late shipment.

Both are manual. Both put the entire burden of finding the late shipment, matching it to an invoice, and filing on time squarely on you. Neither carrier goes looking for shipments it owes you on.

Side by Side

Refund amount. Canada Post refunds the full shipping charge. Purolator refunds 50 percent of the service rate plus taxes, as of March 30, 2026.

Covered services. Canada Post covers Priority, Xpresspost, and some international express. Purolator covers its express courier services, but not Ground Standard or Freight.

Claim deadline. Canada Post gives you 30 business days from the expected delivery date. Purolator gives account customers 15 calendar days from the invoice date.

How to file. Canada Post uses a service ticket with an internal review. Purolator handles account claims by phone, with your Bill of Lading number.

Who can claim. Both carriers allow the shipper to claim, and only the shipper. The recipient cannot file on your behalf.

The Catch Both Carriers Share

Neither guarantee is automatic. Both require you to spot the late shipment yourself, confirm it against the service commitment, and file inside a deadline that is easy to miss. At any real volume, doing that by hand across two carriers with two different rule sets and two different deadlines is the kind of task that gets started, then quietly abandoned.

That is the whole reason most eligible refunds go unclaimed. It is not that the money is not owed. It is that nobody has the time to chase it shipment by shipment.

Let the Audit Do the Chasing

ShipSherlock watches both carriers at once. Every Canada Post Priority and Xpresspost shipment and every Purolator Express shipment is checked against its commitment automatically, the correct refund rule is applied for each carrier, and claims are filed inside each carrier's deadline, the tight Purolator window included. You also get the same coverage on UPS and FedEx, so nothing in your shipping spend goes unchecked.

You pay nothing unless we find money your carriers owe you.

Try the free shipping audit and see what Canada Post and Purolator have been quietly keeping.