<PAGE>   1
                                                                     Exhibit 4.4


                      AMENDMENT NO 3. TO CREDIT AGREEMENT

     THIS AMENDMENT NO. 3 TO CREDIT AGREEMENT (the "AMENDMENT") dated as of
April 1, 1998 by and among Corrpro Companies. Inc., an Ohio corporation (the
"BORROWER"), PNC Bank, National Association ("PNC"), Bank One, N.A. ("BANK
ONE"), National City Bank ("NCB") and LaSalle National Bank ("LASALLE" and
together with PNC, Bank One and NCB, the "BANKS"), and PNC Bank, National
Association, in its capacity as agent for the Banks (the "AGENT").



                                   WITNESSETH:

     WHEREAS, the Borrower, the Banks and the Agent are parties to that certain
Credit Agreement dated as of July 16, 1997 (the "CREDIT AGREEMENT"), as amended
by Amendment No. 1 to Credit Agreement dated as of September 18, 1997 and
Amendment No. 2 dated as of January 21, 1998; and


     WHEREAS, the parties hereto desire to amend the Credit Agreement as
hereinafter provided.



     NOW, THEREFORE the parties hereto, in consideration of their mutual
covenants and agreements hereinafter set forth and intending to be legally bound
hereby, covenant and agree as follows:



     1. DEFINITIONS.

     Defined terms used herein unless otherwise defined herein have the meanings
ascribed to them in the Credit Agreement as amended by this Agreement.


     2. AMENDMENTS OF CREDIT AGREEMENT.


     A. Section 8.2.6(2) of the Credit Agreement is hereby deleted in its
entirety and the following is inserted in lieu thereof:


          "(2) the Borrower, or any Subsidiary may acquire, whether by purchase
     or by merger, (A) all of the ownership interests of another Person or (B)
     substantially all of assets of another Person or of a business or division
     of another Person (each an "PERMITTED ACQUISITION"), PROVIDED that each of
     the following requirements is met:

          (i)  the board of directors or other equivalent governing body of 
     such Person shall have approved such Permitted Acquisition to the extent
     required by law and the charter documents of such entity and, if the
     Borrower or any Subsidiary shall use any portion of the Loans to find such
     Permitted Acquisition, the Borrower or such Subsidiary also shall have
     delivered to the

<PAGE>   2

     Banks written evidence of the approval of the board of directors (or
     equivalent body) of such Person for such Permitted Acquisition;


          (ii)   the business acquired, or the business conducted by the Person
     whose ownership interests are being acquired, as applicable, shall be
     similar or complimentary to one or more line or lines of business conducted
     by the Borrower or its Subsidiaries and shall comply with Section 8.2.10
     [Continuation of or Change in Business];



          (iii)  no Potential Default or Event of Default shall exist 
     immediately prior to and after giving effect to such Permitted Acquisition;

          (iv)   the Borrower shall demonstrate that it shall be in compliance
     on a pro forma basis with the covenants contained in Sections 8.2.15-8.2.17
     and Sections 8.2.19-8.2.20 after giving effect to such Permitted   
     Acquisition (including in such computation Indebtedness or other
     liabilities assumed or incurred in connection with such Permitted
     Acquisition and income earned and expenses incurred by the Person,
     business or assets to be acquired prior to the date of such Permitted
     Acquisition) by delivering at least five (5) Business Days prior to such
     Permitted Acquisition a certificate in the form of EXHIBIT 8.2.6
     evidencing such compliance;

          (v)    the Consideration paid by the Borrower and its Subsidiaries 
     for all Permitted Acquisitions made during the current fiscal year of the
     Borrower shall not exceed $10,000,000 and the aggregate of the
     Consideration paid by the Borrower and its Subsidiaries for such Permitted
     Acquisition and all other Permitted Acquisitions made between the Closing
     Date and the date of such Permitted Acquisition shall not exceed
     $25,000,000; and

          (vi) the Borrower shall deliver or cause to be delivered to the Agent
     at least five (5) Business Days before, such Permitted Acquisition copies
     of any agreements entered into or proposed to be entered into by the
     Borrower or such Subsidiary in connection with such Permitted Acquisition
     and shall deliver to the Agent such other information about such Person
     or its assets as any Bank may reasonably require;

          (3) the Borrower or any Subsidiary may acquire an ownership interest
     in less than all of another Person if the Consideration is less than
     $1,000,000 in the aggregate in any fiscal year provided that the
     Consideration paid under this Section 8.2.6(3) when added to the
     Consideration for Permitted Acquisitions shall not exceed the amount
     permitted under Section 8.2.6(2)(v)."


     B. Schedule 1.1 (B)(1) of the Credit Agreement is hereby amended and
restated to read as set forth on the new Schedule 1.1 (B)(1) attached hereto.


                                      -2-
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     3. CONDITIONS OF EFFECTIVENESS OF THIS AGREEMENT.

     The effectiveness of this Amendment No. 3 is expressly conditioned upon
satisfaction of each of the following conditions precedent:


     (a) REPRESENTATIONS AND WARRANTIES: NO DEFAULTS. The representations and
warranties of the Loan Parties contained in Section 6 of the Credit Agreement
shall be true and accurate on the date hereof with the same effect as though
such representations and warranties had been made on and as of such date (except
representations and warranties which relate solely to an earlier date or time,
which representations and warranties shall be true and correct on and as of the
specific dates or times referred to therein); the Loan Parties shall have
performed and complied with all covenants and conditions hereof; and no Event
of Default or Potential Default under the Credit Agreement shall have occurred
and be continuing or shall exist.

         (b) LEGAL DETAILS; COUNTERPARTS. All legal details and proceedings in
connection with the transactions contemplated by this Amendment shall be in form
and substance satisfactory to the Agent. The Agent shall have received
counterparts of this Amendment No. 3 duly executed by the Borrower and the
Banks, and the Agent shall have received all such other counterpart originals or
certified or other copies of such documents and proceedings in connection with
such transactions, in form and substance satisfactory to the Agent. This
Amendment No. 3 may be executed by the parties hereto in any number of separate 
counterparts, each of which when taken together and duly executed and delivered
shall together constitute one and the same instrument.

     (c) BORROWER CERTIFICATE. The Agent shall have received a certificate
signed by the Secretary or Assistant Secretary of the Borrower certifying as to
all action taken by the Borrower to authorize the execution, delivery and
performance of this Amendment No. 3.

     4. FORCE AND EFFECT. No novation is intended by the Amendment No. 3
and except as expressly modified by this Amendment, the Credit Agreement and
the other Loan Documents are hereby ratified and confirmed and shall remain in
full force and effect on and after the date hereof.


     5. GOVERNING LAW. This Amendment No. 3 shall be deemed to be a contract
under the laws of the Commonwealth of Pennsylvania and for all purposes shall be
governed by and construed and enforced in accordance with the internal laws of
the Commonwealth of Pennsylvania without regard to its conflict of laws
principles.


     6. EFFECTIVE DATE. This Amendment No. 3 shall be dated as of and shall be
effective as of the date and year first above written, which date shall be the
date of the satisfaction of all conditions precedent to effectiveness set forth
in this Amendment No. 3.



                            [SIGNATURE PAGE FOLLOWS]



                                      -3-
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         [SIGNATURE PAGE 1 OF 1 TO AMENDMENT NO. 3 TO CREDIT AGREEMENT]

     IN WITNESS WHEREOF, the parties hereto, by their officers thereunto duly
authorized, have executed this Amendment as of the day and year as above
written. 



                              CORRPRO COMPANIES, INC.                      
                                                                           
                                                                           
                                                                           
                              By:                                          
                                 -------------------------------------     
                              Title:                                       
                                    ----------------------------------     
                                                                           
                                                                           
                              PNC BANK, NATIONAL ASSOCIATION,            
                              individually and as Agent                    
                                                                           
                                                                           
                                                                           
                              By:                                          
                                 -------------------------------------     
                              Title:                                       
                                    ----------------------------------     
                                                                           
                                                                           
                              BANK ONE,  N.A., individually and as         
                              Documentation Agent                          
                                                                           
                              By:                                          
                                 -------------------------------------     
                              Title:                                       
                                    ----------------------------------     
                                                                           
                                                                           
                                                                           
                              NATIONAL CITY BANK
                                                                           
                                                                           
                                                                           
                              By:                                          
                                 -------------------------------------     
                              Title:                                       
                                    ----------------------------------     
                                                                           
                                                                           
                                                                           
                              LASALLE NATIONAL BANK                      
                                                                           
                                                                           
                                                                           
                              By:                                          
                                 -------------------------------------     
                              Title:                                       
                                    ----------------------------------     
<PAGE>   5


                               SCHEDULE 1.1 (B)(1)
                 COMMITMENTS OF BANKS AND ADDRESSES FOR NOTICES

PART I - COMMITMENTS OF BANKS AND ADDRESSES FOR NOTICES TO BANKS
<TABLE>
<CAPTION>

                                                          Amount of Commitments
                                                  --------------------------------
                                                  Revolving Credit        Ratable
                                                  ----------------        -------
        Bank                                         Loans                Share
        ----                                         -----                -----
<S>                                              <C>                    <C>     
PNC Bank, National Association
One Cleveland Ctr.
1375 East 9th St., Ste. 1250
Cleveland, OH 44114
Attention: David J. Williams
Telephone (216)  348-8562                         
Telecopy: (216)  348-8594                        $15,333,333.33         38.3333%



Bank One.  N.A.
600 Superior Ave.
Cleveland,  OH 44114
Attention: Babette C. Coerdt
Telephone (216) 781-2226                           
Telecopy: (216) 348-6642                         $12,000,000.00         30.0000%



National City Bank 
1900 East 9th St.
Cleveland, OH 44114
Attention: Sean Richardson
Telephone (216) 575-2488
Telecopy: (216) 575-9396                          $7,666,666,67         19.1667%



LaSalle Banks
One American Square, Suite 1600
Indianapolis, IN 46282
Fax: 317-756-7021
Attention:    Keith D. Slifer or 
              Gary L. Jacobson 
Telephone (317) 756-7013
Telecopy: (317) 756-7021                          $5,000,000.00         12.5000%



            Total                                $40,000,000.00        100.0000%
                                                 ==============        ======== 
</TABLE>

                            Page 1 of 2 to Schedule
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                               SCHEDULE 1.1(B)(1)
                 COMMITMENTS OF BANKS AND ADDRESSES FOR NOTICES


PART 2 - ADDRESSES FOR NOTICES TO BORROWER AND THE OTHER LOAN PARTIES:



BORROWER:

Name:      Corrpro Companies, Inc.
Address: 1090 Enterprise Drive
Medina, OH 44256
Attention:   Neal R. Restivo
Telephone:   (330)  723-5082
Telecopy:    (330)  723-0244

                            Page 2 of 2 to Schedule