What is being certified here
A constitution sets out how a company is governed: who signs, who binds it, and what the directors may do alone. The apostille says nothing about any of that. It confirms only that the signature on the copy belongs to someone the British authority recognises, which is a narrower claim than most people assume when they request one.
Choosing a copy that will work
Because the stamp is about a signature, the copy you choose decides everything. A version issued by the public register of companies carries a signature of the kind the Legalisation Office holds on file. A copy certified by a solicitor or notary does the same. A file exported from an internal system carries none.
Getting this right at the outset is what makes the legalisation of a Memorandum & Articles of Association in Sheffield straightforward. The office works by post from one address and keeps no counter anywhere, so a rejected copy costs a full postal round rather than a short conversation over a desk.
Sets, speed and what it costs
The official fee is £45 for each document by post, or £40 for each document on the next-day route open to registered businesses. A constitution usually travels with other corporate papers, so the fee multiplies across the bundle. Corporate deadlines are fixed, which is exactly what the faster route exists to serve.
Where it goes, and in what language
To apostille a Memorandum & Articles of Association in United Kingdom is generally part of establishing something overseas. A registry wants to see the company's rules before it will record a branch, and a bank wants them before it opens an account. Public tenders often ask for the same paper alongside proof of good standing.
Where the receiving office works in another language, have the translation prepared once the stamp is in place. A translation made beforehand describes the constitution alone, while the file now carries a government stamp too. A mismatch between the two is a common reason a company bundle is handed back untouched.