Eggs-zactly.
When I was in an office pool we all signed an informal agreement outlining how the tickets would be bought and how winnings (if any) would be distributed.
A local group just won $16 million. They have an attorney and a trust already.
http://www.mysanantonio.com/news/local_news/article/Group-has-ticket-to-lottery-riches-3336691.php
Office pools can work. IF everyone has more than an ounce of brains. It sounds like this Jersey group screwed up.
http://www.lotterypost.com/news/135957
http://www.lotterypost.com/news/153257
The first link title = “Lawsuit over $315 million lottery jackpot goes to trial”.The second link title = “Lawyer in $315 million lottery lawsuits ordered to pay fine”.