Exhibit (a)(1)(C)
NOTICE OF GUARANTEED DELIVERY
FOR
TENDER OF SHARES OF COMMON STOCK
OF
COMSHARE, INCORPORATED
TO
CONDUCTOR ACQUISITION CORP.,
AN INDIRECT WHOLLY OWNED SUBSIDIARY OF
GEAC COMPUTER CORPORATION LIMITED
(NOT TO BE USED FOR SIGNATURE GUARANTEES)
THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, EASTERN TIME, ON
WEDNESDAY, JULY 30, 2003, UNLESS THE OFFER IS EXTENDED.
This Notice of Guaranteed Delivery, or a form substantially equivalent
hereto, must be used to accept the Offer (as defined below) (i) if certificates
("Share Certificates") representing shares of common stock, par value $1.00 per
share ("Shares"), of Comshare, Incorporated, a Michigan corporation, are not
immediately available, (ii) if Share Certificates and all other required
documents cannot be delivered to EquiServe Trust Company, N.A., the depositary
for the Offer (the "Depositary"), or (iii) if the procedures for book-entry
transfer cannot be completed on a timely basis. This form may be delivered by
hand or by mail to the Depositary and must include a guarantee by an Eligible
Institution (as defined in Conductor Acquisition Corp.'s Offer to Purchase,
dated July 1, 2003 (the "Offer to Purchase")). See Section 3 of the Offer to
Purchase.
The Depositary for the Offer is:
EQUISERVE TRUST COMPANY, N.A.
<Table>
By First Class Mail: By Certified or Express By Hand:
EquiServe Trust Company Delivery: EquiServe Trust Company
Attn: Corporate Actions EquiServe Trust Company c/o Securities Transfer &
Post Office Box 43014 Attn: Corporate Actions Reporting Services, Inc.
Providence, RI 02940-3014 150 Royall Street 100 Williams Street Galleria
Canton, MA 02021 New York, NY 10038
</Table>
DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER THAN AS
SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY TO THE DEPOSITARY.
THIS FORM IS NOT TO BE USED TO GUARANTEE SIGNATURES. IF A SIGNATURE ON A
LETTER OF TRANSMITTAL FOR THE OFFER IS REQUIRED TO BE GUARANTEED BY AN "ELIGIBLE
INSTITUTION" (AS DEFINED IN THE OFFER TO PURCHASE) UNDER THE INSTRUCTIONS
THERETO, SUCH SIGNATURE GUARANTEE MUST APPEAR IN THE APPLICABLE SPACE PROVIDED
IN THE SIGNATURE BOX ON SUCH LETTER OF TRANSMITTAL.
THE ELIGIBLE INSTITUTION THAT COMPLETES THIS FORM MUST COMMUNICATE THE
GUARANTEE TO THE DEPOSITARY AND MUST DELIVER THE LETTER OF TRANSMITTAL OR AN
AGENT'S MESSAGE (AS DEFINED IN THE OFFER TO PURCHASE) AND SHARES TO THE
DEPOSITARY IN THE TIME PERIOD SHOWN HEREIN. FAILURE TO DO SO COULD RESULT IN A
FINANCIAL LOSS TO SUCH ELIGIBLE INSTITUTION.
THE GUARANTEE ON THE FOLLOWING PAGES MUST BE COMPLETED.
Ladies and Gentlemen:
The undersigned hereby tenders to Conductor Acquisition Corp., a Michigan
corporation (the "Purchaser") and an indirect wholly owned subsidiary of Geac
Computer Corporation Limited, a corporation governed by the Canada Business
Corporations Act, upon the terms and subject to the conditions set forth in the
Offer to Purchase and in the Letter of Transmittal (which, together with any
amendments or supplements thereto, collectively constitute the "Offer"), receipt
of which is hereby acknowledged, the number of Shares set forth below, all
pursuant to the guaranteed delivery procedures set forth in Section 3 of the
Offer to Purchase.
Number of Shares:
- --------------------------------------------------------------------------------
Certificate Nos. (if available):
- --------------------------------------------------------------------------------
(Check box if Shares will be tendered by book-entry transfer) [ ] The
Depository Trust Company
Account Number
- --------------------------------------------------------------------------------
Dated
- --------------------------------------------------------------------------------
Name(s) of Record Holder(s):
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
PLEASE PRINT
Address(es):
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
(ZIP CODE)
Daytime Area Code and Tel. No.:
- --------------------------------------------------------------------------------
Signature(s):
- --------------------------------------------------------------------------------
GUARANTEE
(NOT TO BE USED FOR SIGNATURE GUARANTEE)
The undersigned, a firm that is a participant in the Security Transfer
Agent's Medallion Program or Nasdaq Stock Market Guarantee Program or the Stock
Exchange Medallion Program or an "eligible guarantor institution," as such term
is defined in Rule 17Ad-15 under the Securities Exchange Act of 1934, as
amended, hereby guarantees to deliver to the Depositary either the certificates
representing the Shares tendered herewith, in proper form for transfer, or a
Book-Entry Confirmation (as defined in Section 3 of the Offer to Purchase) with
respect to such Shares, in any such case together with a properly completed and
duly executed Letter of Transmittal for the Offer, with any required signature
guarantees, or an Agent's Message (as defined in Section 2 of the Offer to
Purchase), and any other required documents, within three trading days (as
described in the Letter of Transmittal for the Offer) after the date hereof.
THE ELIGIBLE INSTITUTION THAT COMPLETES THIS FORM MUST COMMUNICATE THE
GUARANTEE TO THE DEPOSITARY AND MUST DELIVER A LETTER OF TRANSMITTAL FOR THE
OFFER OR AN AGENT'S MESSAGE AND CERTIFICATES FOR SHARES TO THE DEPOSITARY WITHIN
THE TIME PERIOD SHOWN HEREIN. FAILURE TO DO SO COULD RESULT IN A FINANCIAL LOSS
TO SUCH ELIGIBLE INSTITUTION.
Name of Firm
- --------------------------------------------------------------------------------
Address(es):
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
(ZIP CODE)
Area Code and Tel. No.:
- --------------------------------------------------------------------------------
AUTHORIZED SIGNATURE
Name:
- --------------------------------------------------------------------------------
PLEASE TYPE OR PRINT
Title:
- --------------------------------------------------------------------------------
Dated:
- --------------------------------------------------------------------------------
Signature(s):
- --------------------------------------------------------------------------------
NOTE: DO NOT SEND SHARE CERTIFICATES WITH THIS NOTICE. SHARE CERTIFICATES SHOULD
BE SENT WITH YOUR LETTER OF TRANSMITTAL FOR THE OFFER.