make sure you get the money before you put the name on the riders list, you don't want 10 names down with no money 2 weeks before the day and then have riders bail. It happens all the time. We run it as, your name goes on the riders list when the cash hits the account.
Remember to send any payments to whoever is organising as a friends/family payment. This way there are no charges. You might not think a couple of quid matters but if everyone does it then you are £140 down (2 riders worth) when it comes to bill payment.