Guess My Age Man
 16
 18
 23
 26

Brandon - 18

"I'm 18 but guess what I do? I buy for all my buddies who are still underage."
Tip: Watch out for third party sales.
Be careful if he wants to purchase multiple brands, or if his "friends" are wandering around the store. If you have reason to believe a third party sale is taking place, the responsible think to do is to refuse the sale.
Guess My Age Woman
 15
 18
 23
 26

Tara - 23

"Don't I look old enough? Why do I have to show you ID?!"
Tip: Carding is part of your job.
Explain to your customers that store policy requires you to ask for ID. It's not your choice, it's your job.
Guess My Age Man
 15
 18
 23
 26

Jacob - 15

"I'm only 15. I like to dress this way so you think I look older"
Tip: Don't let appearance fool you.
Don't be fooled by the dress of your customers. Glasses and sport coat may add a few years to a customer's appearance. Look for clues like tone of voice, attitude and hair styles and wrinkles.