This reminds me of the movie The Lookout. In it, at one point the protagonist is pulled over and asked for his driver's license. However, he's mentally disabled and, in that scene, very stressed out; instead he hands the officer a card indicating his disabled status rather than his license and is subsequently released without turning in identifying information, which turns out to be beneficial for him. 2007 was a different time.

Also, I'm not saying OP is disabled or anything, my brain just practices freeform association so the whole "handing over the wrong card" thing connected to a movie I haven't seen in almost twenty years.

[–] Klear@quokk.au 4 points 12 hours ago* (last edited 11 hours ago)

Reminds me of that one time I was sitting on a tram going to school and an older guy came to me and shown me a card. I thought it was ticket control, so I showed him my tram pass and he nodded and went away. Only then did my sleepy brain manage to realise what was on his card - that he's disabled and wants my seat. Apparently he mistook my card for something similar too, since he didn't argue and just went away.

I did jump up and let him sit afterwards, but it took me a bit to realise what just happened.