We’ve talked about an Apostille before. Legalisation is connected. An Apostille “legalises” a Notary’s Stamp and Signature and makes it legally valid for use abroad.
Sometimes, though, an Apostille is only part of the story. Some countries may require you to go through a further stage by legalising the document at their London Embassy. Some may need you to get an Apostille first, some will just want you to go to their Embassy.
Again, the Notary can advise you which countries have which rules and can sort out the administration in getting these stamps sorted. Some countries will charge you much, much more for the privilege if your document is “commercial” as opposed to “personal”. If you are involved in any sort of transaction with a foreign element and you need a Notary it really makes sense to involve them as soon as you can so they can advise you, in particular on how long it might take.
Notaries do not “rubber stamp” or witness documents