Repudiation is the act of denying, disavowing, or shunning something.

It may also refer to:

• Repudiation (custom), the formal act by which a husband forcibly renounces to his wife in certain cultures and religions
• Disownment, the formal act by which a parent forcibly renounces his child
• Anticipatory repudiation is a term in the law of contracts that describes a declaration by one party (the promising party) to a contract that they do not intend to live up to their obligations under the contract
• Non-repudiation is the concept of ensuring that a party in a dispute cannot repudiate, or refute the validity of a statement or contract
• Repudiation (religion), the act of refusing and no longer accepting a philosophical or religious doctrine

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