Whisky after Pesach

Rava said: The reason for the requirement to render leaven null and void is based on a decree lest he find a fine cake [geluska] among the leaven that he did not destroy and his thoughts are upon it. Due to its significance, he will hesitate before removing it and will be in violation of the prohibition against owning leaven. The Gemara asks: And let him nullify it when he finds it. The Gemara rejects this suggestion. Perhaps he will find it only after it is already forbidden, and at that time it is no longer in his possession and he is therefore unable to nullify leaven when it is already Passover, as Rabbi Elazar said: Two items are not in a person’s possession in terms of legal ownership, and yet the Torah rendered him responsible for them as though they were in his property. And these are they: An open pit in the public domain, for which the one who excavated it is liable to pay any damages it causes even though it does not belong to him; and leaven in one’s house from the sixth hour on the fourteenth of Nisan and onward. As this leaven has no monetary value, since it is prohibited to eat or to derive benefit from it, it is not his property, and nevertheless he violates a prohibition if it remains in his domain.

(1) On the evening of the fourteenth [of Nissan] we check for chamets [leavened grain products] by candlelight. Any place into which we do not bring chamets does not require checking. And why did [the Sages] say [that we must check up to] two rows in the wine cellar? [It is] a place which we bring leavened bread into. Beit Shammai says, "Two rows upon the entire wine-cellar." But Beit Hillel says, "The two outer rows, which are the uppermost."

Mishna - "On the night of the 14th, we search for hametz". Rashi explains the reason is so that one does not transgress the Torah prohibitions of seeing and finding hametz. This leads to a difficulty to the position of Rav Yitzchak the Elder - Since he requires "Bitul" (Annulment) as it mentions in the Talmud (Pesachim 6B) - "One who searches for hametz needs to annul." From the Torah, annulment is acceptable to avoid the Biblical transgression. Why did the Hachamim require searching at all? It seems to the opinion of Rav Yitzchak the Elder that even though annulment is sufficient, the Rabbis were stringent to require the searching of hametz and to destroy it so that no person should come to eat hametz on Passover....

MISHNA: It is permitted for a Jew to derive benefit from leavened bread of a gentile over which Passover has elapsed, i.e., leavened bread that remains after the conclusion of Passover. However, it is prohibited to derive benefit from leaven of a Jew over which Passover has elapsed, as it is stated: “And no leavened bread shall be seen with you, neither shall there be leaven seen with you, in all your borders” (Exodus 13:7).

Rabbi Shimon believes that the Torah does not forbid Chametz after pesach after does its time. Therefore, a non-jew's Chametz is permitted. However, the Rabbis forbad a Jew's Chametz. The Rabbis forbad it because he transgressed the Torah prohibition of "Not seeing Chametz and Not finding Chametz in your possession".

If he sold the Chametz or gave it to a Non-jew outside his house, even if the Jew knows the non-jew and that he won't touch the Chametz at all, but he can watch it and keep it for him until after Pesach and then return it to him after Pesach. It must be a complete present without any conditions attached/ or a complete sale, however a present with intent to return does not help.

There is a discussion as to what types of Kinyanim work

Explanation of Rabbeinu Tam's opinion and his position on beer.