What is a Christian supposed to do when a boss gives her a lottery ticket and says, “Good Luck! I hope you win the $153 million dollar drawing tonight!”? (Pastor Cole, that happened to me with those exact words. If I win, you will never need to write another Q & A).
If you mean that you will share the winnings with me, you have already answered the question: you took the ticket hoping to cash it in. I sense a measure of uneasiness, however, as if you fear that taking the lottery ticket was gambling. But the transaction you describe was not gambling. Nothing was at stake, no money in his pocket and none in yours. Your acceptance of the ticket could not have been interpreted as an ungodly commitment to gambling.
You can save the wear and tear on your conscience for serious matters, such as glorifying God in the way that you spend your own money, rather than worry about accepting this piece of paper from your boss.