In interactions, though, I mostly have trouble remembering customers at work... which is awful, since in the place I work, my boss likes to "treat customers like they're at home." Situations often follow like this:
Customer comes in, walks up to me, and asks, "Are my glasses ready?"
Me: "What was your name again?"
Them: "... I was just here yesterday."
Me: "I'm sorry. I see lots of customers every day. I don't remember everyone's name."
Them: "But I was just here yesterday. How do you not remember me?"
Me: "Again, I'm sorry. I actually have this condition where it's hard for me to remember people's faces. If I could have your name, however, I can help you."
Them: "Oh... ...Okay... My name is......"
Mentioning that usually calms them down. However, I have had a time when it didn't work, and when I tried searching my memory to remember the person's face I apparently must've made a weird expression. The customer took it as an insulting look and threatened to get me fired for it. Ugh...
I also had a time where my boss was trying to make me remember a particular customer. I told her I didn't remember him. She continued to ask if I remembered him, describing his looks. I repeated, "I don't remember him." She continued trying. Finally I had to tell her that I can't be expected to remember every person who walks through the front door, especially since I don't even talk to most of them. She said that I "have to" start remembering them. Okay, yeah, just command it, THAT'LL make it easier. (Sarcasm.) I can't even start to explain to her that it's a neurological condition that I can't help, either. She's so dimwitted she can't even follow a simple logic explanation. She'd probably do what she's done other times I've tried to explain my quirks to her- laugh lightly, call me "cute", and walk away.