Related Clues:

• Form W-9 datum: Abbr.
• Common form datum: Abbr.
• Tax ID
• Govt.-issued ID
• ID for the I.R.S.
• Lifelong assignment, briefly?
• No. with an area code
• Card-file no.
• One form of ID
• Paycheck ID, perhaps
• Communications instr.
• ID theft target
• Box "d" on the IRS W-2
• Prefix meaning distant
• Address-bk. info