Apostille vs. Embassy legalisation for United States
Almost every muddle on this corridor comes from one word doing two jobs. A certified copy is a certificate. An apostille is a certificate. Both are official, both carry a seal, and both cost money, so it is entirely reasonable to assume that having one means you are finished. In fact each answers a different question and neither can stand in for the other.
There is no consular stage to worry about beyond them, which is why the pairing is the whole story here. An apostille for United States completes the job once the underlying copy is right, and anyone searching for document legalisation for United States will find the same two-piece answer under a longer name.
United States's Hague status and what it means
The United States has been inside the Hague Apostille Convention since 1981, and the United Kingdom is inside it as well. Because both ends share the agreement, the second certificate is enough on its own and nothing further is added after it. That shared membership is what turns a potentially long chain into two straightforward pieces of paper.
The Wolverhampton to United States route step by step
Piece one is local. Wolverhampton Register Office, Civic Centre, St Peter's Square, Wolverhampton WV1 1RU issues certified copies of births, marriages and deaths held in its registers. For a degree, a company record or a court paper, the issuing body plays the same part, producing a version it is willing to put its own seal on.
Piece two is national and postal. The FCDO Legalisation Office at PO Box 6255, Milton Keynes MK10 1XX attaches the apostille and posts the document back. An apostille issued in Wolverhampton for use in United States is therefore never handed over a counter in the city; the local counter is where piece one comes from.
Cost and timing for this route
Plan for two waits as well as two payments. The copy has to be ordered and produced before the second certificate can even be applied for, since the apostille is attached to something. Government charges for the apostille are £45 per document by standard post and £40 per document next-day for registered businesses, and each document is counted on its own.
Keeping the pair together
Once both pieces exist they are one item, and treating them as two is where late problems come from. Do not detach the apostille to scan it more neatly, do not file the copy separately, and do not send an apostille from United Kingdom to United States without the sheet it belongs to. A certificate on its own certifies nothing anybody can use.