How we check our facts
Where the carrier and platform facts on ProtonShip come from, when they were checked, and how to tell us about a mistake.
Carrier facts come from the carriers
Service names, delivery times, size and weight limits, dimensional weight, claim deadlines and holiday closures come from each carrier’s own Canadian pages, service guides and terms of service. Every carrier page, service page and guide lists those sources and the day we checked them.
The limits and divisors on our pages and in our size calculator come from the same catalog our quotes use, so a page and a quote give the same answer for the same box.
Platform facts come from each company’s own site
Our comparisons quote each platform’s own pages and terms, with links, and show the date they were checked. “Not stated” means we didn’t find it on their public pages that day. We re-check every comparison each quarter, and before we change a claim.
Examples use published rules
When a page works out a billable weight or checks whether a box fits, it uses the carrier’s published divisor and limits. Prices appear in a quote, for the parcel and route you enter.
How guides and blog posts are dated
Guides are updated in place, and the date at the top is the last time their facts were checked. Blog posts are snapshots of the day they went out; a correction goes in a new post.
Who writes them
The ProtonShip team writes and checks every page. ProtonShip is a Canadian company based in Toronto. About ProtonShip
Found something out of date?
Carriers change their rules, and we would rather hear about it from you than get it wrong. Tell us what you found, with a link if you have one, and we’ll check it and update the page and its date.
Four carriers in one account
UniUni, Purolator, UPS and FedEx, paid per label.