四分律行事鈔資持記 2.2135

2.2135

忘見，標中。謂懺長罪捨衣時，遺忘不盡；及懺罪已，方見忘物；而染不染別，故須辨之。

Under forgotten and discovered, in the heading: This means when confessing offenses of extra items and relinquishing robes, one forgets some and does not exhaust them; and only after having confessed the offense does one discover the forgotten items. Since contaminated and uncontaminated differ, one must distinguish them.