Embassy legalisation for use in Senegal
Senegal accepts a single-step certification, so the consular stage is absent and there is nothing to book at an embassy. Your paper needs one certificate from the FCDO Legalisation Office, and with that it is ready to travel. Reading this first saves real effort, because most people plan for a chain of offices and start ringing round for appointments that do not exist. Plan instead for a single official check, done by post.
What the one certificate promises
Every stamp in this field answers a narrow question, and it helps to know which. The registrar's seal says an entry exists in a public book. The FCDO certificate says the registrar's seal is genuine. Nobody, at any point, certifies that the contents are true, and no reader should be told otherwise. Document legalization for Senegal therefore ends where trust in the signature ends, which is why one careful check does the work of several loose ones.
The Belfast to Senegal route, start to finish
Order the certified copy, post it to the Legalisation Office, wait for the certificate, and hand the finished paper to whoever asked for it. Four moves, one of which belongs to a government office and three of which belong to you. Because embassy legalization for Senegal from Belfast is not part of the picture, there is no fifth move and no diplomatic bag to track. The job ends the day the envelope comes back through your door.
Cost, and the fee that never appears
An official fee applies at the Legalisation Office and that single charge covers the public side of the work. The register charges separately for a certified copy, and postage each way is on you. What never appears is a consular charge, because no consulate opens a file on this route at all. Anyone who quotes for one is pricing a stage that does not run, so read a quote line by line before agreeing to it.