What does “SSN” mean?

Social Security number. Your 9-digit number for work, taxes and benefits.

What to do

Give it only when you must. Real letters usually show only the last 4 digits.

You may see it in letters from

• Social Security Administration (SSA) — Social Security office

“SSN” is a English word used in official letters in the United States. Briefly explains words like this automatically when you check a letter.

More office words

ITIN · EIN · A-Number · receipt notice · RFE · NOID · biometrics · green card · all words