Your response should contain at least 3 sentences. Your answer must contain at least 2 placeholders represented by square brackets, such as [address]. Highlight at least 2 sections in your answer with markdown, i.e. *highlighted section*. Include keywords [certificate, verification, authenticity] in the response. In your response, the word [document] should appear at least 3 times. At the end of your response, please explicitly add a postscript starting with P.S.
user