Reference for Ketubot 200:4
אמר אמימר משמיה דרב יוסף ב"ד שמכרו בלא הכרזה נעשו כמי שטעו בדבר משנה וחוזרין
Amemar said in the name of R. Joseph: A court that sold [an estate] without a [previous] public announcement are deemed as though they erred with regard to a law cited in a Mishnah and [their decision] must be reversed.
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