A mosque is a place that fulfils the following conditions: 1- It has been set aside as a Waqf and is no longer the property of the one who established it. 2- General permission to pray in it has been given. 3- It is established for the purpose of offering the five daily prayers regularly and on a permanent basis.

1. It is not permissible to make lost property announcements in the mosques or to make announcements about items that have been found. 2. Whoever wants to make a lost property announcement, let him go outside the mosque, and if he writes on a piece of paper and sticks it on the outside wall of the mosque. 3. If the advertisement has to do with an act of worship, there is nothing wrong with it. But if the advertisement has to do with worldly matters, then it is prohibited.