Legalising an Adoption Certificate from London
Anyone asking how to legalize an Adoption Certificate wants a single answer, and this is one of the places where there are two of them. The run either finishes with the British mark or carries on to a mission abroad, and which of those you are looking at is decided by the country that will read the file.
Issuing body & pre-requisites for an Adoption Certificate
The certificate comes from the body that holds the record behind it, and anything travelling alongside it comes from wherever that paper was raised. Each sheet in a bundle is handled and charged on its own along the route, so a set of three moves as three jobs sharing one envelope.
Before anything is posted, the signature on the sheet is checked locally so the British desk has something solid to work from. That local check is what the Legalisation Office (FCDO) then vouches for. It does not read the record or reissue it; it confirms whose pen signed the sheet in front of it.
Cost & turnaround
Around £45 goes to the Legalisation Office for each document, and where the consular stage applies the mission adds a fee of its own. Handling is quoted at 7–10 business days as standard and 2–3 business days on the express lane. That British desk works by post, so an envelope in each direction sits outside both windows.
Common uses abroad
An adoption certificate is usually wanted when a household has to show a relationship to an office that holds no record of it — a school place, a residence file, an application that turns on who a child belongs to. Requests like those arrive with dates attached, which is why the length of the run matters here more than the price of it.
What the route does not change
Nothing along the way alters the words on the certificate. Every stage confirms the mark before it, which is why a mistake in the record has to be settled with the body that holds it rather than anywhere on the route. To legalize an Adoption Certificate in London is to collect signatures on a sheet, never to have it rewritten.