reinf0rce:
You only ask for payment once you're done with the commission? Aren't you afraid someone takes advantage of you? Or do you finish the commission before they pay but not show it to them until after they pay?

There’s always a risk, but at least I won’t be considered some internet scammer. I prefer to do my work and have a clear conscience.

I get done with the commission, then I scan it and send a small preview in low quality to request the payment, that way I can prove that the sketch is done so I can get paid, once received, I send the good quality JPG file.