I play both lottos in Texas and this is one of my worst phobias. I have have even envisioned the newspaper misprinting the numbers and printing to correct numbers the next day after I've all ready thrown my ticket away. THE HORROR!
You should keep your old, dead tickets for a year for irs use. If you get a win that is reportable income, you get to deduct all your losses that year against the win. Just a hint.