Is it permissible for a husband to install recording devices for his wife's calls without her knowledge to verify if she is speaking to non-mahram men in a forbidden manner, especially if he heard this from people outside the home and does not have evidence?
If the evidence is strong and it is known that the wife has weak religious commitment and lacks trustworthiness, then he is permitted to do so.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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