Is it permissible for the wife of a man who does not pray to pay zakaat al-fitr on behalf of herself and her children?

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Check below answers in case you are looking for other related questions:
Ruling on one who neglects prayer
When zakaat al-fitr should be paid

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Related Answers:
There is a dispute between him and his wife – should he pay zakaat al-fitr on her behalf?
The husband does not have to pay fitrah for his wife with whom he has not consummated the marriage
Is it permissible for a daughter to pay zakaat al-fitr on behalf of her father?
Ruling on one who neglects prayer
When zakaat al-fitr should be paid

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