Plural of estoppel; multiple legal situations where someone is prevented from contradicting their earlier statements or actions in court.
From estoppel (noun) + -s plural marker. Estoppel itself comes from Old French estopper, meaning to stop or block up, applied to legal contexts in England around the 15th century.
Different types of estoppel protect different kinds of fairness: promissory estoppel protects people who relied on promises, while equitable estoppel prevents fraud. It's the law's way of saying 'consequences matter.'
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