I'm pretty sure you'll need some proper documentation such as a drivers license or ID card, I know they copied my DL and put it on my script. Why bother though? It will cost you $150 and valid for only the week you're here. In CA an oz. or less has been decriminilized, the worst that can happen is you'll get ticketed for having it but no criminal record or court appearance. Now if you have an oz. and it's all packaged in dime baggies you'll be in big trouble. My advice is to get here, buy a half oz and smoke it up just don't walk down main street CA firing up a doobie in front of other people and you'll be just fine.