Is it obligatory for a girl who has repented from sins to inform her suitor about her past, and is it permissible for her to lie or swear falsely if he asks her about it?

If a person is afflicted with a sin and repents from it with sincere repentance, Allah accepts their repentance and replaces their bad deeds with good ones. It is recommended for one who has committed a sin to conceal it and not inform anyone about it, and to repent to Allah, benefiting from Allah's concealment of their sin in this world so that He may conceal it in the Hereafter. It is not permissible for a person to expose themselves if Allah has concealed their sin, and whoever conceals a Muslim, Allah will conceal their sins.

Fiancés or spouses should not question each other about the past, as it leads to suspicion and distress. Their focus should be on the other party's rectitude.

If the husband insists on questioning or wants to verify something, it is permissible for the wife to swear an oath and use tawriyah (equivocation) in her oath, such as saying, "By Allah, nothing of that sort happened," intending: it did not happen yesterday.

Lying in an oath is permissible if the one swearing the oath is oppressed, or fears harm upon themselves or others, or if there is a prevailing benefit. In these cases, it is recommended to use ma'areedh (allusive speech) instead of explicit lying, unless there is a necessity for explicit lying. Lying has been permitted in three situations: in war, for reconciliation between people, and in a man's conversation with his wife to please her. This is interpreted as applying to explicit lying or tawriyah, and anything necessitated by a pressing need or an overriding benefit can be analogized to it.