What is the polite way to ask? ?

Hello, I have a Christmas Secret Santa Gift Exchange coming up in a few weeks. What is the best way to ask the participant to mail their gift by Dec 3? It is a zoom gift exchange, so what is the best way to ask? 

donnie2020-11-30T02:08:38Z

Well the first problem is that it’s on zoom. It’s more special if it’s done in person. But I suppose it’s better then nothing. I would just say it like you would if you where in person