Why does the Social Security Administration’s eCBSV service need my consent?

In order to prevent fraud, eCBSV allows permitted entities to verify if an individual’s SSN, name, and date of birth combination matches the Social Security records. 

The Social Security Administration needs the number holder’s written consent with a wet or electronic signature in order to disclose the SSN verification. 

More information can be found here: https://www.ssa.gov/dataexchange/eCBSV/