Related Clues:

• ID on a mortgage application
• ID no. on a tax form
• 'Last four digits' ID, for short
• No. with two dashes
• Bit of info for an accountant: Abbr
• Only four-ninths of it is usually shown: Abbr
• Oft-redacted no
• ID needed to enroll in Medicare, for short
• Fig. with two hyphens
• Pay stub ID
• ID since 1935
• Fig. whose first three digits were geographically based until 2011
• Nine-digit entry on IRS forms
• ID needed to apply for FAFSA
• Letters from the government?