When taking the wife back (following a revocable divorce), it is not essential that the wife know

No File Exists
Check below answers in case you are looking for other related questions:
She married him without a guardian (wali) and now she wants to leave him, but he does not want that
Is it permissible for him to stay in the same house with his divorced wife?

No File Exists
Related Answers:
He divorced his wife three times in a state of extreme anger
Her husband reviles her and accuses her and threatens to kill her; is it permissible for her to ask for a divorce from him?
He issued a threefold divorce that So and so should not work with him in the store or else he would leave
She married him without a guardian (wali) and now she wants to leave him, but he does not want that
Is it permissible for him to stay in the same house with his divorced wife?

Recommended answers for you:
The girl's father disagrees with a marriage –what is the solution?
Rulings on miscarried foetus
Ruling on organ donation
Ruling on smoking the argileh or shisha – and a discussion on its harmful effects
Etiquette of Eid