If I was the guy running the skins for any particular flight this is how I would run it.
1. Once the flights are determined I would make a message on the board stating the cost of my skins and people can prepay early via Zelle, paypal or any other method prior to the tournament.
2. I would get to the course early place a sign on the 1st and the 10th tee stating the cost of the skins and that if people are intrested in playing they have to text you their intentions prior to their tee time.
3 I would collect money up until my tee time and then collect those funds from those plays who texted you after your tee time once they have come off of the course as well as inform everyone that they must text you with all the birdies and that no skins will we pay out unless you receive a text message only after they have been verified