확인한

In a sentence

• 나는 그 문서를 확인한 후 서명했다.

  I signed after checking the document.

  In this sentence, "확인한" is used as the past determiner to indicate an action where the speaker completed checking something, modifying "문서" (document).

• 확인한 정보가 정확했어.

  The verified information was accurate.

  Here, "확인한" serves as a past participle to describe the information that was verified or cross-checked, modifying "정보" (information).

• 확인한 사람은 그 곳에 없었다.

  The person who confirmed was not there.

  In this context, "확인한" is used in a clause to describe the individual who performed the act of confirmation, modifying "사람" (person).