Mischeck

Naturally, especially when they first join the Knighthood, some children who have always been careless about the truth will continue to be so and will mischeck their charts.

Source: wiktionary

The June 1975 form had the Indefinite box checked; the January 1976 had the Never box checked. The checking of these boxes is not significant enough to deny benefits and could equally be mischecked by a nurse or secretary in the doctor's office.

Source: wiktionary

[…] however, given the rapid return to report levels preceeding^([sic]) the spike it is believed those subjects may have mischecked their questionnaires.

Source: wiktionary

This is the second squadron pay roll you've mischecked today.

Source: wiktionary