What is social security modeling?

What is modeling? The certification of retirees is very simple. I personally went to the scene, took my ID card and social security card, filled in my name, ID number and signature for the first authentication. I found my name after many certifications. Certification staff matched your ID card with mine, signed it at the back, and passed the authentication. I really don't understand what you said about models.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.