Please use the comment or message section to inform your renderer of the do's and don't of your request before arriving.
Ensure the face of the renderer matches what is on their profile and ask who they're here for. Once the picture matches the face of the renderer, verify the pin on their device with yours before proceeding. Cancel request if the pin doesn't match.
And should there be any doubt in your mind concerning the renderer, politely let the requester know and cancel the request immediately.