ived ] ▁the ▁test ator ' s ▁acknowled gment ▁[ that ▁he ▁or ▁she ▁actually ▁signed ▁the ▁will ] ." ▁In ▁a ▁Pennsylvania ▁case , ▁the ▁will s ▁of ▁a ▁husband ▁and ▁wife ▁were ▁invalid ated ▁because ▁they ▁accident ally ▁signed ▁each ▁other ' s ▁will s . ▁ ▁F org ery ▁In ▁some ▁cases ▁a ▁will ▁cont ests ▁is ▁based ▁on ▁alleg ations ▁that ▁the ▁will ▁is ▁for ged . ▁F org ery ▁can ▁range ▁from ▁the ▁fabric ation ▁of ▁an ▁entire ▁document , ▁including ▁the ▁sign atures , ▁to ▁the ▁insert ion ▁or ▁modification ▁of ▁pages ▁in ▁an ▁otherwise ▁legit imate ▁will . ▁ ▁According ▁to ▁a ▁ 2 0 0 9 ▁Wall ▁Street ▁Journal ▁article , ▁" charg es ▁of ▁forg ery ▁are ▁more ▁common ▁than ▁proven ▁cases ▁of ▁it . ▁They ▁often ▁origin ate ▁with ▁an ▁adult ▁child ▁who , ▁feeling ▁short - changed ▁in ▁a ▁parent ' s ▁will , ▁acc uses ▁a ▁sib ling ▁of ▁doctor ing ▁the ▁document ". ▁▁ ▁Notable ▁cases ▁of ▁for ged ▁will s ▁include ▁the ▁" M orm on ▁will " ▁alleg edly ▁written ▁by ▁re clus ive ▁business ▁ty co on ▁Howard ▁Hugh es ▁( 1 9 0 5 - 1 9 7 6 ), ▁and ▁the ▁How land ▁will ▁forg ery ▁trial ▁( 1 8 6 8 ) ▁in ▁which ▁s oph istic ated ▁mathematical ▁analysis ▁showed ▁that ▁the ▁signature ▁on ▁a ▁will ▁was ▁most ▁likely ▁for ged . ▁British ▁phys ician ▁Harold ▁Sh ip man ▁killed ▁numerous ▁elder ly