Minors (all persons under the age of 18) must be accompanied by his/her parent and/or legal guardian. 

Valid government-issued photo identification for BOTH minor and accompanying adult must be presented at the time of the piercing. (Drivers Permit/License, Passport/Passport Card)

In the case of differing last names or the presentation of non-government-issued photo identification, a birth certificate or court document denoting legal guardianship must be presented alongside photo identification.

If photo identification of the minor is unavailable, a birth certificate can be accepted. 

You can print off your own copies of both the Notarized Consent Form and the Minor Release Form here and here.