Ignoring age limit laws for online alcohol sales can result in retailers losing their liquor licenses, and it is considered illegal, as outlined in this FindLaw article.
It is to purchase alcoholic beverages online in the United States while being under the age of 21, as all 50 states adhere to a federal mandate. buy alcohol online without being 21
Why A Minimum Legal Drinking Age of 21 Works | Alcohol Use - CDC Ignoring age limit laws for online alcohol sales