Which route applies to your Thailand file
Two routes exist and only one is live. The short route is a single certificate, the apostille, added by an Italian authority and read straight off by the receiving country. The long route adds a stamp from the destination's own mission in Italy. Thailand sits on the long route until its accession starts, so document legalisation for Thailand means both desks today.
Thailand's Hague status and the date that matters
The accession year on record for Thailand is 2027, and the treaty starts working there on 28 February 2027. Joining and starting are separate events, and only the second one changes what a Thai office will take. Before that day an Italian apostille has no effect there. After it, the consular stamp drops out of the job and the Italian certificate stands on its own. Stated plainly, the apostille requirements for Thailand shrink to a single Italian sheet once that day passes.
The Padua → Thailand route step by step
Everything hangs on who signed the paper. A record issued by a public office goes to the Prefettura; a court judgment or a notarial deed goes to the Procura della Repubblica. Pay the €16 stamp as you hand it in, and the same desk gives the paper back stamped a while later. After that the bundle travels to the Thai mission in Italy, which adds the consular stamp and the charge it sets, and the file is done.
What it costs and how long to allow
One figure is fixed and one moves. Fixed: the tax stamp on each paper at the Italian desk, with exemptions for some record types. Moving: the consular charge, plus however long the mission takes, which no page can pin down for you. Add the days the bundle spends in transit and you have the real timeline. Once the switchover date arrives the moving part disappears and only the Italian step is left.
Common mistakes on this corridor
The two that cost the most time are order and copies. Order: stamps go on last, after any sworn translation, because each stamp covers only what is already in the bundle. Copies: a plain photocopy carries no live signature for the Italian desk to match, so it comes straight back over the counter. Get an apostille from Italy to Thailand wrong on either point and you repeat both visits, not one.