Settlement visa to UK sponsor documents
As a bit of preempted advice to anyone who is wishing to apply for a settlement visa to the UK including a fiancee visa to the UK if the documents supplied to the British Embassy are only copies then it is advisable now to sign the copies of the documents to prove their authenticity this is not a requirement but it is strong advice.
Also when you write your sponsorship letter for your Thai wife or Thai fiancee then make sure the letter is signed and endorsed by yourself as some people like to just e-mail a copy of the letter with no signature which sometimes looks un professional and the Embassy can use it as a reason to look deeper at the documentation so try to endorse the documents with your signature.
This is our professional advice and not a requirement but when paying the expensive UK Settlement visa Embassy fee you do not want to make any mistakes.