QuickLinks -- Click here to rapidly navigate through this document

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549


FORM 15

CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934.

Commission File Number        000-24413

TROY Group, Inc.
(Exact name of registrant as specified in its charter)

2331 South Pullman Street, Santa Ana, California 92705
(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)

Common Stock
(Title of each class of securities covered by this Form)

(Title of all other classes of securities for which a duty to file reports under section 13(a) or 15(d) remains)

        Please place an X in the box(es) to designate the appropriate rule provision(s) relied upon to terminate or suspend the duty to file reports:

Rule 12g-4(a)(1)(i)   [X]   Rule 12h-3(b)(1)(i)   [X]
Rule 12g-4(a)(1)(ii)   [  ]   Rule 12h-3(b)(1)(ii)   [  ]
Rule 12g-4(a)(2)(i)   [  ]   Rule 12h-3(b)(2)(i)   [  ]
Rule 12g-4(a)(2)(ii)   [  ]   Rule 12h-3(b)(2)(ii)   [  ]
        Rule 15d-6   [  ]

        Approximate number of holders of record as of the certification or notice date: 215

        Pursuant to the requirements of the Securities Exchange Act of 1934, TROY Group, Inc. has caused this certification/notice to be signed on its behalf by the undersigned duly authorized person.

DATE: February 3, 2005   By:   /s/  PATRICK J. DIRK      
Patrick J. Dirk
Chief Executive Officer



QuickLinks

FORM 15