Saudi Arabia accepts a simpler certification
When papers from Sunderland must be used in Saudi Arabia, you usually do not need a full embassy legalization for Saudi Arabia. The destination accepts a single certification from the Legalisation Office (FCDO). This replaces the multi-step chain that involves authenticating at the source and then having an embassy check it again. If you hold a civil record like a birth or marriage certificate, you can order a fresh certified copy from Sunderland Registration Service at City Hall, Plater Way, SR1 3AA.
What happens for Saudi Arabia
You send the paper to the UK's Legalisation Office by post, also known as the apostille service. They issue the right stamp for it to be recognised in Saudi Arabia without consular legalization for Saudi Arabia. This direct route is how most files go through, as only rare cases ask for more. The FCDO Legalisation Office in Milton Keynes is reachable by mail at PO Box 6255, MK10 1XX, with no in-person counter.
Content that Saudi offices expect
All text for Saudi Arabia must be in Arabic. You must get a full translation of each paper first, as this does not come as part of the single certification step. Until you have your embassy legalization for Saudi Arabia from Sunderland, the office there will not finalise anything. Document legalization for Saudi Arabia includes a vetting of the words by a qualified translator, who works under strict rules. The name and stamp of the language expert must show on every page they handle.