Date: 14 Shevat 5595
From: Rabbi Moshe Sofer
To: Rabbi Shmuel Shmelka Meizlish
The Chasam Sofer comprehensively addresses the halachic framework for selling chametz to a non-Jew before Pesach and selling or renting property to avoid Shabbos labor prohibitions. He validates the standard chametz sale as fully genuine when conducted with proper kinyanim and fair market value.
Source: Shu"t Chasam Sofer OC §113