Is it still mandatory for 18-year-old men to sign up with the SS? I thought there was a conscientious objector clause still in place?
Yes, it’s still mandatory. You can object to the draft itself if inacted and you are drafted, but you still have to register.
My son turned 18 last year. IIRC, he got a card with his name, address, birthday and maybe SSN#.
The bottom line:
1. verify the information
2. reply only if incorrect
3. automatically registered.