Telling a person that his vow has been broken so he can offer expiation

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Check below answers in case you are looking for other related questions:
Is it acceptable to give used clothes as expiation for breaking a vow (kafaarat yameen)?
When there is a conflict between fulfilling an oath and honouring one's parents

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Related Answers:
Swearing an oath by raising the hand – is it considered to be an oath?
He vowed to fast Rajab, Sha’baan and Ramadaan, but he cannot do so because of his work
He vowed to marry a certain girl then he did not fulfil his vow
Is it acceptable to give used clothes as expiation for breaking a vow (kafaarat yameen)?
When there is a conflict between fulfilling an oath and honouring one's parents

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