coun·ter·check 
(kountər-chĕk′)
(kountər-chĕk′)n.
1. Something that serves to check, restrict, or limit something else.
2. Something that confirms or denies the correctness of a previous check.
tr.v. (koun′tər-chĕk) coun·ter·checked, coun·ter·check·ing, coun·ter·checks
1. To oppose or check by a counteraction.
2. To check again in order to verify.