The deposit address will be the same address used to purchase the tickets so hopefully users will be able to keep track of it anyway. My intention was to buy the tickets all at once and take a screenshot of blockexplorer and ring the tickets purchased by the syndicate.
For BitLotto Jr (and the main one) make sure you don't send it all at once. (I think you know that though) Each ticket has to be a separate payment. Oh, and don't wait till the very end in case the payments don't make it in a block in time! (I guess worst case they would just go to the next weeks draw) Something to consider would be making a payment of 0.050001 (or other unique amount) for each ticket. Yes, you are paying a very TINY amount more but when people see the BitLotto Jr site it will be really easy to pick out what ones are the syndicate ones. It would work until someone else decides to pay that amount too for some reason. Or just make them all at once and you can probably tell what ones are yours based off of the time you get your first confirmation. It will be the same time of the transaction in blockexplorer. Anyways, good luck with your project. If you need any help or advice feel free to PM me. Thanks for the advice. Yeah I'm in two minds about buying the tickets all at once or buying them when a new syndicate member sends their coins to me. This is a test run so I guess I'll see which will be the best way after this weeks draw.
On a side note:
Because this is the first draw I am purchasing two tickets myself to increase our syndicate members chances of winning!
I love this idea. Pooled gambling.