Don't you have to renew your driving license photo every few years?
If the old photos are still on file, having multiple photos in the same style of a person a few years apart is actually probably quite a good training set.
My current driver's license photo is over a decade old and doesn't expire until 2023. At least when I renewed my license they didn't want to update the photo of me when I was 16 and just renewed it for 8 years. In theory I'll probably need to update my photo then, but as it is right now I look nothing like the photo on my driver's license.