The World Federation One Stop Fiqh

Ruling 2520

If a person knows that his wife is in the state of ḥayḍ  or nifās and he separates from her – for example, he goes on a journey – and he wishes to divorce her, he must wait until he attains certainty (yaqīn) or confidence (iṭmiʾnān) that she is clear of ḥayḍ or nifās and then he can divorce her. The same applies if he doubts [that she is clear of ḥayḍ or nifās] as long as he observes what was said in Ruling 2518 about divorce by an absent man.