The odd position you are in
Most things you buy can be inspected on arrival. A certified translation for Togo cannot, at least not by you, because the whole point is that you do not work in the language it is written in. That gap is not a flaw in the service; it is the reason the service is signed at all, and it shapes how the finished set is put together.
The parts that survive intact
Some things do not change when a sheet moves into another language. Names stay as they are written. Dates keep the same day, month and year. Certificate numbers, reference codes and amounts are carried across untouched. A certified translation into French in London can therefore be spot-checked by anyone, in any language, by laying the two documents side by side and reading down those fields.
That is a small check, and it is worth doing because it catches the errors that matter most in practice. A misread digit in a reference number will stop a file long before an awkward turn of phrase does. Everything else — sentence structure, the rendering of a title, the choice between two fair equivalents — sits beyond an ordinary reader and belongs to the translator.
What the oath stands in for
This corridor calls for a sworn translation, and the person who provides it is a traducteur assermenté, formally appointed to give sworn translations. Their signed statement names the sheet, the date and themselves. An official French translation in London made this way puts an identifiable, appointed person behind the text, which is exactly the assurance a reader who cannot judge the words needs.
Rate, days, and keeping your own sheet
The work is about £25 a page, finished in 2–4 business days or 24–48 hours on express. A certified translation in London for Togo runs from an image, so your own certificate stays at home. Where the paper is a civil record, Westminster Register Office at 317 Harrow Road, London W9 3RJ issues certified copies of birth, marriage and death entries, and one of those can be imaged instead.