Passport is best. And plugs for other dispensaries is pretty lame when answering a question.... Kim an out of state drivers license will work as well, and Substance is a very great and fair place... Funny.... "Mr. Nice Guy" used to be an independent shop....
A valid government issued photo ID is the requirement. That's generally a state issued driver's license or identity card. Passports are totally fine too, and are required for international travelers. US residents can simply use their regular driver's license.
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