overcheck

/OW1 V ER0 CH EH0 K/
noun
  1. 1

    A check pattern that is superimposed upon another pattern

  2. 2

    A strap that stretches from the pollstrap of the bridle to the saddle

verb
  1. 1

    To check or verify more than necessary.

Source: https://en.wiktionary.org/wiki/overcheck