Do not put digital IDs on your phone, for any reason.
""But if you hand over your unlocked phone to a police officer and offer to show them something, “it becomes this complicated factual question about what consent you’ve granted for a search and what the limits of that are,” Brett Max Kaufman, a senior staff attorney in the ACLU’s Center for Democracy, told The Verge. “There have been cases where people give consent to do one thing, the cops then take the whole phone, copy the whole phone, find other evidence on the phone, and the legal question that comes up in court is: did that violate the scope of consent?”"