It is allowed to use the rennet that is extracted from the animal that was not slaughtered according to Islamic laws since it is Tahir and exempted from the prohibition of using parts of the dead animal.
<p style="text-align: left;">If a person suffering from incontinence joins between the two prayers with one wudhu, then it is sufficient to wash the urinary organ before the first prayer for both prayers.</p>
One should look for its owner and give it to him. With despair of finding the owner, one should give it as a charity on the ownerâ€™s behalf. If the papers have the name(s) of Allah written on them, one should dispose of them by placing them in a river or the like. You should not be afraid of its effect and depend on Almighty Allah, and recite Ayatul Kursi as it is known that it is beneficial in such cases.