Checking a customer’s ID is not just for cigarette and liquor sales anymore. New “app store accountability” laws in Texas, Utah and Louisiana mandate that Google and Apple mobile stores, and maybe others, check all users’ ages before each app download and obtain permission slips from minors’ parents. Companies with apps now have a duty to know the age range of their customers, and they must update app stores when materially changing their app’s data processing, user features and monetization elements. This article, with insights from experts at Blank Rome, Loeb & Loeb, Pillsbury, Sheppard Mullin and Wilson Sonsini, examines the three new laws and discusses their implications and uncertainties. It also offers compliance strategies and addresses the practical effects for companies of broader changes in age verification law, including the recent U.S. Supreme Court decision in Free Speech Coalition v. Paxton. See “The Practical and Legal Complexities of Online Age Verification” (Jun. 21, 2023).