#credential__certificate__certification__credentials__credential  a document attesting to the truth of certain stated facts
  supertype:  #written_document__writtendocument__document__papers  writing that provides information (especially information of an official nature)
  subtype:  #certificate_of_incorporation  state approval of the articles of incorporation of a corporation
  subtype:  #identity_card__card  a card certifying the identity of the bearer; "he had to show his card to get in"
     subtype:  #business_card  a card on which are printed the person's name and business affiliation
     subtype:  #membership_card  a card certifying membership in an organization
        subtype:  #union_card__unioncard  a card certifying membership in a labor union
     subtype:  #library_card__librarycard__borrower's_card  a card certifying the bearer's right to use the library
     subtype:  #ration_card  a card certifying the bearer's right to purchase rationed goods
  subtype:  #birth_certificate__birthcertificate  a copy of the official document giving details of a person's birth
  subtype:  #diploma__sheepskin  a document certifying the successful completion of a course of study
  subtype:  #military_commission__commission  an official document issued by a government and conferring on the recipient the rank of an officer in the armed forces
  subtype:  #bill_of_health  a certificate saying that a ship's company was healthy
  subtype:  #teaching_certificate__teacher's_certificate__teacher'scertificate  a certificate saying that the holder is qualified to teach in the public schools
  subtype:  #probate_will__probatewill  a judicial certificate saying that a will is genuine and conferring on the executors the power to administer the estate

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