The Collaborative International Dictionary of English v.0.48:

Vindicatory \Vin"di*ca*to*ry\, a.
   1. Tending or serving to vindicate or justify; justificatory;
      vindicative.
      [1913 Webster]

   2. Inflicting punishment; avenging; punitory.
      [1913 Webster]

            The afflictions of Job were no vindicatory
            punishments to take vengeance of his sins. --Abp.
                                                  Bramhall.
      [1913 Webster]

WordNet (r) 3.0 (2006):

vindicatory
    adj 1: of or relating to or having the nature of retribution;
           "retributive justice demands an eye for an eye" [syn:
           retaliatory, relatiative, retributive,
           retributory, vindicatory]
    2: given or inflicted in requital according to merits or
       deserts; "retributive justice" [syn: retributive,
       retributory, vindicatory]
    3: providing justification [syn: justificative,
       justificatory, vindicatory]