I haven't been turned away at the door, thankfully I am met with the compliment I look better in person than in pics. (I'm not photogenic, or expierienced in angles and all that. I spent most of my life avoiding having my photo taken.) I kind of prefer it anyways as it starts us both on the right footing.
I'm too forgetful. I have a built in protocol in my head, and it is set for when I walk in to see someone. The only part of this that feels like business to me on a visit is the transaction part. I walk in with my phone in hand. And I will only put it away once I am paid. And let my safty contact know all is well, before putting my phone away. I was raised with business first then fun. I have rarely had to outwardly ask. Often we have our greetings, if it is out somewhere, I ask politely if that is for me. (I don't want to just assume any cash I see laying out is it, so I ask.) Otherwise if they don't get the donation, I suggest I need it to put my phone away.
It isn't even for lack of trust in the client any more, but a set in structure so I don't forget. The moment the money and phone are away, it becomes time to forget the exhistance of time and get lost in eachothers company, however we see fit to enjoy, until at some point the phone chimes to break us out of our escape.
It is like that because I know myself, and if certain things aren't done in exactly the same way all the time for me, it can throw me off and I get forgetful. Even in my other job, I set up auto structures to not forget important steps, and if I get distracted, things go out of order, something will be missed. So I stick to my order.
When it is challenged, I have no problem walking out without being paid. I won't even ask for compensation. Often when someone is trying to withhold the donation, it is because they don't have enough, or don't have Canadian currency and I'm not down to playing games, or be scammed myself.