Welcome to Just Answer and thanks for your question. I'm sorry no one has responded to you. The experts at Just Answer do not work for individuals offline. All research is conducted through this forum.
The ancestry.com Social Security Death Index is the best and only way that individuals can search Social Security numbers of people who have died. Even those are not necessarily up to date. There is no way that anyone can search Social Security numbers of living people since that is personal and confidential information.
If you have a specific question, you can post it here, and see if someone has the answer.
1. Yes, you can search their Death records offline, or they will do it for you, but they do not put together a social security number and a living person for you. That would be a serious infringement of personal privacy and make stealing a person's identity no trouble at all for crooks.
2. I had never heard of the letter forwarding, and don't know how that would work, since there is no way to get the Social Security number of a living person.
I'm sorry you don't appreciate the facts. Social security numbers of living people are not searchable. Period. I will opt out though since no one can give you the answer you want.
I'll be glad to do that when they are open. As you may know tomorrow is Martin Luther King Day and many government offices are closed for holiday. They will reopen Tuesday and I will telephone them Tuesday afternoon after I get off work.
I just found this link online, which gives the guidelines for Social Security to forward letters to living people. See if this gives you all the information you need, or if you still need me to call. I've done genealogy research for 25 years, and this is the first I've known that this is even possible.
Now that I know the answer to
If you have the person's Social Security number, that is all they need to find the person so they can forward a letter. They only require the parents' names, date and place of birth, etc. if you don't have the Social Security number.
I don't make the rules, and like most government rules, they don't always make a lot of sense. Trying to think this one out though, if a person such as yourself knows the Social Security number (SSN), then it takes about a nanosecond to find that individual in their database. If all the person has is names and dates it is going to take considerably longer to search. I would also think that if the person were missing and you knew his SSN, then presumably you already knew most of the other stuff as well.
I will look forward to helping you. Have a great day!