Source policy

Updated November 2026.

We prefer primary sources for factual claims. The best source depends on the question being answered.

Products, software and refills

Manufacturer manuals, technical specifications and compatible-media lists establish a product’s supported functions and supplies. We check the full model and any relevant suffix or revision. A family name or similar width can cover several different products.

For a product link, we check the exact Amazon UK listing and selected pack or bundle. Product photos come from Amazon’s authorised image service. Retailer wording is checked against the manufacturer where a technical claim needs clarification.

Postage and marketplace workflows

We use the instructions published by the carrier, marketplace or software provider responsible for the step. A service bought through a marketplace can have different printing or handover choices from a direct booking. Guides identify the route they describe and link to its own instructions.

A QR code, PDF, label size and handover point are checked in context. A source about one carrier or country is used only for the part it supports.

Evidence and uncertainty

Source references are recorded with the guide’s research. We keep nominal dimensions, physical media measurements and printable areas distinct. We explain when an example needs a sample check on the reader’s own material, printer or parcel.

Where a specification or listing conflicts, we narrow the claim to what the available evidence supports, seek a clearer source or leave that item out of the recommendation. We identify illustrative calculations and avoid presenting them as measured results.

Keeping information current

We recheck important specifications, product destinations and image availability when publishing or substantially updating a guide. A later stock, software or carrier change can require another review. An update label records the guide’s substantive review, while the linked provider remains the source for the current booking or offer.

Our editorial policy describes how this research is used in the finished articles.