He found a winning lottery ticket; is it permissible for him to cash it in?

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Check below answers in case you are looking for other related questions:
Ruling on participating in pension plans
Taking a card and giving money to its owner and five other people, in a pyramid scheme

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Related Answers:
Ruling on players contributing money towards buying prizes for the winner
Ruling on prize draws in shopping centres
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Ruling on participating in pension plans
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