I've recently contacted the Federal Benefits Unit (FBU) at the embassy by email with a Social Security question, and they responded quickly (they usually do). This is the address I used:
[email protected]
They will ask for the following information, and including it in your initial email will expedite things:
Full name
Date of birth
Last four digits of the worker's social security number
Country of residence and complete address
One or more telephone numbers where you may be reached
Description of your request
Also, I mailed my signed 'Proof of Life' document to the embassy about 10 months ago without any issues. I noted 'Attention: FBU Proof of Live' below the embassy's address on the envelope so it could more easily be funneled to the correct office.
Hope this helps...
