Embassy legalisation for use in Thailand
Nothing in a Thai office can tell a real Italian signature from a copied one, so the chain does that work instead. The body that issued your record is known to the Prefettura or the Procura. Those Italian authorities are known to the destination's mission in Italy. The mission's seal is the only mark on the file that a reader in Thailand is trained to check.
What the Thai consular desk looks for
Embassy legalization for Thailand from Turin turns on a clean, complete file rather than on speed. Every page that belongs to the record should be in the bundle before it is sealed, including any translated text. Names carried from Thai script into Latin letters have more than one fair spelling, so pick the one on the passport and hold it on every page. Mixed spellings in one file invite a second look at the desk.
The Turin → Thailand route step by step
Four moves and no shortcuts. Collect a signed original. Decide between the Prefettura and the Procura by who signed that original, since the two split the work between administrative and judicial papers. Pay the tax stamp and get the Italian legalisation. Then lodge the file at the destination's mission, which adds its seal and returns the bundle to you complete.
Cost and timing on this route
The predictable half is the Italian one: €16 per document as a tax stamp, plus the days it takes a state office to check a signature it already knows. The unpredictable half belongs to the destination, which sets its own consular fee and its own queue. Standard end-to-end handling runs 10–15 business days, with 3–5 business days available on the express route.
Points that belong to Thailand alone
Document legalization for Thailand rewards a file that reads the same way twice. Because the receiving office works in Thai, the translated text does most of the talking, and any gap between it and the Italian page becomes the question you are asked. Dates are the usual gap: an Italian date order can be read the other way round, so spell the month out and remove the doubt before the file leaves Turin.