I would review Ken's post, as he said "Obviously, you could forward it to the customer and ask him to contact you directly if he wants you to provide the information..."
This is sage advice. I've never heard of one being reused. But I envision myself in front of a jury, and it is easier to explain, "it seemed very dated, and I wanted the assurance from our customer that this was their intent" rather than standing in front of my boss who is asking me "what were you thinking..." The road of caution would not slow the process substantively, would demonstrate to the customer that you are watching out for them, and if the other guy is taking shortcuts, it puts them on notice that you don't.
My opinions are not necessarily my employers.
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell