Another reason is recovering a stolen horse. LE is also not in the habit of passing out horses to people claiming to be the owner, and many have requirements for identifying one’s own horse.
An evacuation/rescue coordination organization gave a very good tip for identification, and that is the borders of markings. The border pattern tends to be a unique feature.
Some borders are crisp, white to color is immediate with no transition. Some borders show a bit of ‘fade’, visually, as it were, and some show a lot of fade. Sometimes the border is so gradual that it isn’t even clear where it begins and ends.
Also the line/pattern of the border tends to be unique.
Close-ups of the entire distance of every marking border could be very helpful. Not just both sides of a leg, but the front and back as well. The border tends to remain consistent over the years, but it is good to check that there haven’t been changes in a horse’s coat.
This is just as true for pinto markings. Amazingly, if there is a large gathering situation in an evacuation, or a number of similar horses found re a theft ring, some pintos can appear similar.
Horse color and descriptions are especially hard for non-horse people. These days even in rural counties most LE have no experience with horses. That can also be true of volunteers at an evacuation center.
It may be helpful to set aside some time to get a good set of identification photos of your horse to save to a special album. Make sure the light is behind you when photographing. If the light is behind the horse, it may look like a dark gray blob.