You must not meet his father or brother with or without niqab as they are not your mahram. Once you marry, his father becomes mahram for you. You must refuse and reject such a request no matter what the consequences are. There is no compromise in religion.

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If it goes to poor and needy Muslims, this is permissible. You must be sure of that. It is better to give it to trustworthy people who would know how to spend it in an Islamic way

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