Nowhere in this list does it say junk mail is acceptable

https://www.state.nj.us/rpa/MVC%20Six-Point.htm

Proof of Address for Citizens and Non-Citizens - all applicants, citizens and non-citizens, must present proofs of address, which may include, but are not limited to one of these:

Utility or credit card bill issued in the past 90 days that shows your name at your current address

Checking or savings account statement from a bank or credit union, issued within the past two years

High school or college report card or transcript containing your address, issued within the past two years

Original lease or rental agreement showing your name as the lessee or renter

Property tax bill, statement or receipt from the past year

Any letter or correspondence (including tax bills) received from the IRS or state tax office in the last year

First-class mail received from any federal, state or local government agency in the past six months

If the applicant is under 18 and doesn't otherwise have proof of address, the MVC will accept a Parent or Guardian Certification that verifies the applicant is living with a parent or guardian