FILER:

 COMPANY DATA:
 COMPANY CONFORMED NAME:               ALLIANT ENERGY CORPORATION
 CENTRAL INDEX KEY:
 STANDARD INDUSTRIAL CLASSIFICATION:   ELECTRIC AND OTHER SERVICES COMB. [4931]
 IRS NUMBER:                           391380265
 STATE OF INCORPORATION:               WI
 FISCAL YEAR END:                      12/31

 FILING VALUES:
 FORM TYPE:                            U-6B-2/A
 SEC ACT:
 SEC FILE NUMBER:
 FILM NUMBER:

 BUSINESS ADDRESS:
 STREET 1:                             222 WEST WASHINGTON AVENUE
 CITY:                                 MADISON
 STATE:                                WI
 ZIP:                                  53703
 BUSINESS PHONE:                       608-252-3311

 MAILING ADDRESS
 STREET 1:                             P. O. BOX 192
 CITY:                                 MADISON
 STATE:                                WI
 ZIP:                                  53701-0192





                       SECURITIES AND EXCHANGE COMMISSION
                             Washington D. C. 20549

                                  FORM U-6B-2/A

                          Certificate of Notification

                           ALLIANT ENERGY CORPORATION

     This certificate is notice that Alliant Energy Corporation ("AEC"),  during
the period from December 1, 2001 through December 31, 2001, has issued,  renewed
or guaranteed the security or securities  described herein, which issue, renewal
or guaranty was exempted from the  provisions of Section 6(a) of the Act and was
neither the subject of a  declaration  or  application  on Form U-1 nor included
within the  exemption  provided  by Rule U-48  [Reg.  Section  250.48  Paragraph
36,621].

1.   Type of the  security -  Commercial  paper notes  issued by Alliant  Energy
     Corporation.

2.   Issue, renewal or guaranty - New Issues

3.   Principal amount - See Schedule 1

4.   Rate of interest - See Schedule 1

5.   Date of issue, renewal or guaranty - From December 1, 2001 through December
     31, 2001

6.   If renewal of security, give date of original issue - Not Applicable

7.   Date of maturity of each security - various ranging from 1 day to 100 days.

8.   Name of the person to whom each security was issued, renewed or guarantied:
     Cede & Co.

9.   Collateral given with each security: None

10.  Consideration received for each security: See Schedule 1

11.  Application of proceeds of each security: See Schedule 1

12.  Indicate by a check after the applicable statement below whether the issue,
     renewal or guaranty of each  security  was exempt  from the  provisions of
     Section 6(a) because of
     a. the  provisions  contained  in the first  sentence  of 6(b),  : X
     b. the  provisions  contained  in the  fourth  sentence  of 6(b),  :
     c. the provisions  contained in any rule of the commission  other than
        Rule U-48, :

13.  See Schedule 2.

14.  Not Applicable

15   Not Applicable.




                                    ALLIANT ENERGY CORPORATION

Date:  February 11, 2002            By:
      -------------------           ------------------------------------------
                                    Enrique Bacalao, Assistant Treasurer









                           Alliant Energy Corporation
                                  Form U-6B-2/A

                                   Schedule 1
                                   ----------


             PERIOD FROM DECEMBER 1, 2001 THROUGH DECEMBER 31, 2001


1.   During the period from December 1, 2001 through December 31, 2001,  Alliant
     Energy   Corporation   issued   commercial  paper  to  fund  borrowings  by
     participants  in the Utility Money Pool and for other business  purposes as
     follows:


                                   
                                         December
                                         --------
                Beginning Balance      $  55,874,000
                CP Issued              $ 176,748,000
                CP Matured             $ 164,233,000
                Ending Balance         $  68,389,000
                Max Daily Balance      $  68,389,000



2.   The weighted average interest rate for the period was 2.84%.



                           Alliant Energy Corporation
                                  Form U-6B-2/A

                                   Schedule 2
                                   ----------


Calculation under item 13 Form U-6B-2/A:

Principal amount of securities for which Alliant Energy Corporation is primarily
or  secondarily  liable  and fair  market  value of  equity  securities  for the
Reporting Period:



                                                

        Alliant Energy Corporation Senior Notes    $    24,000,000
        Guaranteed Long-term debt of AER             1,105,791,000
        Alliant Energy Corporation Common Stock      2,309,451,000

                                                -------------------
        Total                                      $ 3,439,242,000
                                                                5%
                                                -------------------
        5% of Total                                $   171,962,000
                                                      =============