▁the ▁will ▁dis poses ▁of ▁such ▁property . ▁Under ▁this ▁low ▁standard ▁for ▁compet ence , ▁one ▁may ▁possess ▁test ament ary ▁capacity ▁but ▁still ▁lack ▁mental ▁capacity ▁to ▁sign ▁other ▁contract s . ▁Furthermore , ▁a ▁test ator ▁with ▁serious ▁de ment ia ▁may ▁have ▁" l uc id ▁periods " ▁and ▁then ▁is ▁capable ▁of ▁writing ▁or ▁modifying ▁a ▁will . ▁ ▁Other ▁nations ▁like ▁Germany ▁may ▁have ▁more ▁string ent ▁requirements ▁for ▁writing ▁a ▁will . ▁L ack ▁of ▁mental ▁capacity ▁or ▁in comp et ence ▁is ▁typically ▁proven ▁by ▁medical ▁records , ▁ir r ational ▁conduct ▁of ▁the ▁de ced ent , ▁and ▁the ▁testim ony ▁of ▁those ▁who ▁observed ▁the ▁de ced ent ▁at ▁the ▁time ▁the ▁will ▁was ▁executed . ▁Sim ply ▁because ▁an ▁individual ▁has ▁a ▁form ▁of ▁mental ▁ill ness ▁or ▁disease , ▁under go es ▁mental ▁health ▁treatment ▁after ▁repeated ▁suic ide ▁attempts , ▁or ▁exhib its ▁ecc ent ric ▁behavior , ▁does ▁not ▁mean ▁the ▁person ▁automatically ▁la cks ▁the ▁requ is ite ▁mental ▁capacity ▁to ▁make ▁a ▁will . ▁ ▁Und ue ▁influence ▁Und ue ▁influence ▁typically ▁involves ▁the ▁accus ation ▁that ▁a ▁trust ed ▁friend , ▁relative , ▁or ▁care g iver ▁act ively ▁proc ured ▁a ▁new ▁will ▁that ▁reflect s ▁that ▁person ' s ▁own ▁des ires ▁rather ▁than ▁those ▁of ▁the ▁test ator . ▁Such ▁alleg ations ▁are ▁often ▁closely ▁linked ▁to ▁lack ▁of ▁mental ▁capacity : ▁someone ▁of ▁sound ▁mind ▁is ▁unlikely ▁to ▁be ▁s way ed