Originally Posted by Jamie Gardner

The problem with credit cards as age verification is how do you prove that the person using the card is the actual owner of it? Someone who is under 18 years old could grab a credit card of one of their parents or an older friend. The difference with the laws against underage people drinking alcohol is that if a kid walks in to a liquor store and tries to buy alcohol, the person at the counter would know something is wrong because they can see what the person looks like. This heavily cuts down on underage people buying alcohol. A teenager could pass for 21 but it would be extremely unlikely that a 10 year old could make someone else think they are 21.