The decision comes first
We organise guidance around the sender’s task: choose an eligible service, measure a finished parcel, prepare accurate documents and understand what happens after acceptance. We do not publish a universal “best courier” ranking because a provider’s suitability changes with the route, contents and deadline.
Three levels of certainty
- General principle: a packed parcel must be measured, not guessed.
- Carrier-specific condition: a dimension limit, charging divisor or claim deadline belongs to a particular service.
- Dispatch-time check: a current quote, route restriction or customs requirement must be verified before booking.
Primary sources take priority
For service eligibility and liability, consult the current provider terms. For customs, consult the relevant government authority. For specialist restrictions, use the applicable official standard and the carrier’s acceptance rules. A summary on this site is a starting point, not a substitute for those sources.
Useful reference organisations include the Universal Postal Union, the World Customs Organization and the International Air Transport Association. Specialist dangerous-goods rules require proper interpretation; mentioning a standard does not certify a parcel as compliant.
What we do not claim
We do not operate a courier network, sell shipping labels, access live tracking systems or represent customs authorities. We have not conducted a controlled performance test of the named carriers. Illustrations explain concepts and do not show actual routes, transit times or carrier facilities.
Provider names are used for identification. This site is not affiliated with Royal Mail, USPS, DHL, FedEx, UPS or the reference organisations linked here. We do not provide customs, tax or legal advice.
Corrections and useful questions
If something appears inaccurate, tell us the page, the statement and the official source that clarifies it. Please omit tracking numbers, private addresses and identity documents. We cannot promise an individual response or resolve a delivery dispute.
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