▁und ue ▁influence ). ▁Rach el ▁has ▁standing ▁to ▁contest ▁the ▁will , ▁as ▁she ▁is ▁named ▁in ▁the ▁document , ▁but ▁she ▁will ▁not ▁be ▁permitted ▁to ▁submit ▁any ▁evidence ▁as ▁to ▁the ▁mistake ▁because ▁it ▁is ▁not ▁an ▁ambigu ous ▁term . ▁Instead , ▁she ▁will ▁have ▁to ▁sue ▁Mon ica ' s ▁lawyer ▁for ▁legal ▁mal p ract ice ▁to ▁recover ▁the ▁difference . ▁Finally , ▁Jo ey ▁is ▁neither ▁someone ▁who ▁stands ▁to ▁inherit ▁from ▁Mon ica ▁nor ▁named ▁in ▁the ▁will ▁and ▁so ▁is ▁bar red ▁from ▁contest ing ▁the ▁will ▁altogether . ▁ ▁Gr ounds ▁for ▁contest ing ▁will ▁Common ▁grounds ▁or ▁reasons ▁for ▁contest ing ▁a ▁will ▁include ▁lack ▁of ▁test ament ary ▁capacity , ▁und ue ▁influence , ▁ins ane ▁del usion , ▁fra ud , ▁dur ess , ▁technical ▁fla ws ▁and ▁forg ery . ▁ ▁L ack ▁of ▁test ament ary ▁capacity ▁L ack ▁of ▁test ament ary ▁capacity ▁or ▁dispos ing ▁mind ▁and ▁memory ▁claims ▁are ▁based ▁on ▁assert ions ▁that ▁the ▁test ator ▁lack ed ▁mental ▁capacity ▁when ▁the ▁will ▁was ▁draft ed , ▁and ▁they ▁are ▁the ▁most ▁common ▁types ▁of ▁test ament ary ▁challeng es . ▁Testament ary ▁capacity ▁in ▁the ▁United ▁States ▁typically ▁requires ▁that ▁a ▁test ator ▁has ▁sufficient ▁mental ▁ac u ity ▁to ▁understand ▁the ▁amount ▁and ▁the ▁nature ▁of ▁the ▁property , ▁the ▁family ▁members ▁and ▁the ▁loved ▁ones ▁who ▁would ▁ordin arily ▁receive ▁such ▁property ▁by ▁the ▁will , ▁and ▁( c ) ▁how