Thank you for everyone's response! From my experience (and I am new at this), people mostly just forget and some are not smart phone savvy, especially vendors outside of large metropolitan areas.
@Penny Clark good tip about the tenant file. I should start a Google folder to keep all these pictures. I have a paper file right now, but not one to keep things like this.
@Manolo D. I will definitely consider doing that in the future. So far, the work I need are relatively short and isolated. But in the future I should definitely do something like that for larger projects.
@Bill Devola I hear you that asking for pics is a tough way to manage repairs while out of state. I am not at the point where I need a full time property manager. So far every contractor I have used is based off of at least 1 recommendation from someone who has used them before. If you have any other advice or wisdom about what more I can do while self-managing from out of state, please do share! I'm always trying to improve.
The consensus here seems to be to write it into the contract and don't pay until you get everything you contracted for, which would include getting photos. I will definitely do this from now on!