Purity: Must a Guest Inform the Host About Making Something Najis?

Practical Laws of Islam as per the teachings of Imam Khamenei

Purity: Must a Guest Inform the Host About Making Something Najis?

English:

Question #281:

If a guest makes any household appliance of his host najis, is it obligatory for him to inform the host about it?

Answer #281:

If it is used in eating and drinking, he must inform the host. If it is something that lack of knowledge about its being najis invalidates wuḍū’ or ghusl, one must inform the host by obligatory caution. Otherwise, informing is not required.

-Imam Khamenei, Practical Laws of Islam, Rules of Najis Substances