term:

Dispute

dispute vb

dis·put·ed
dis·put·ing
vi
: to engage in a dispute [disputing with management over contract terms]
vt
: to engage in a dispute over [disputing the correct application of the contract provision]
;esp
: to oppose by argument or assertion [disputed changes to the grievance procedure]
dis·put·able [di-spyü-tə-bəl, dis-pyə-tə-bəl]
adj

n : an assertion of opposing views or claims
: a disagreement as to rights
;esp
: one that is the subject of proceedings for resolution (as arbitration)