More desks means more handling
Haiti has not joined the Hague Apostille Convention, so a single slip does not close the route and embassy legalisation is required instead. The practical result is not difficulty but distance: more desks, more envelopes and more journeys for one small piece of paper. Each of those movements is a place where a file can be delayed, damaged or simply lost.
Let a replaceable copy travel
The protective move is the certified extract. Edinburgh Registration Service at City Chambers, 253 High Street, Edinburgh EH1 1YP, prints certified extracts of Scottish civil records, and each is a signed record rather than a photocopy. Because a fresh extract can always be ordered again, letting it travel turns the worst case from a permanent loss into an ordinary nuisance.
The British stage, done by post
The FCDO Legalisation Office is the United Kingdom's authority for apostilles and works from a post box in Milton Keynes with no public counter. The charge is £45 for each paper, or £40 for each paper on the faster lane open to registered businesses. Nobody speeds this up by turning up, so the useful planning is about packaging rather than persuasion.
Carriage, tracking and the long leg
Document legalisation for Haiti involves a long international leg, and that leg is the one worth spending money on. A tracked service costs more than ordinary post and earns it back the first time a package is late and you can still see where it sits. Arrange the outward carriage before the stamped paper reaches you, so nothing waits idle in a drawer.
French, and arriving in usable shape
French is the language of official life in Haiti, so an English extract commonly needs a French version travelling with it. Beyond language, condition decides the rest. A page that lands flat, clean and with every slip still fastened is one a clerk can act on, while a creased bundle with a loose sheet raises questions nobody can settle at that distance.