Notarised translations are needed for some international legal proceedings, property transactions abroad, US schools, employers and agencies that ask for them, and some EU administrative processes. They are NOT needed for UK visas — and USCIS doesn't require them either.
Cross-border situations are the main one. If a foreign authority — not UKVI — is asking for the translation and that country's system uses notarisation, then yes, you'll need it. US use is the most common case in our caseload: not USCIS itself, which accepts a certified translation for USCIS, but the US schools, employers, courts and state agencies that ask for a notarized copy. International property and adoption proceedings come up periodically. FCDO apostille, where you're legalising a UK document for use abroad, often requires the translation to be notarised first.
For those cases we work with registered notaries across the UK. The certified translation is produced first, then a notary appointment is scheduled to witness the translator's declaration. Lead time is usually three to five working days from order to notarised PDF.
If the translation is going to the United States, there's a quicker route: notarized translation for the US, added at checkout. A US notary public notarizes your certified translation and you get a digital notarized PDF on the standard delivery timeline. It costs £20 per document ($26.45 / €24 on US-dollar and euro orders) — at checkout you say how many documents you're notarizing and pick which ones, and each is notarized and charged separately — and it's standard delivery only, so it can't be combined with Same-Day Rush. It is valid for US use only: it won't help with a UK visa or a submission in any other country.