<PAGE>
                                                                   EXHIBIT 10(a)



                         MONTHLY SERVICER'S CERTIFICATE

                              CONSUMERS FUNDING LLC
                $468,592,000 SECURITIZATION BONDS, SERIES 2000-1

   Pursuant to Section 3.05 of the Servicing Agreement dated as of November 8,
2001 (the "Consumers Servicing Agreement") between Consumers Energy Company, as
 Servicer and Consumers Funding LLC, as Issuer, the Servicer does hereby certify
                                  as follows:

Capitalized terms used in the Monthly Servicer's Certificate (the "Monthly
Certificate") have their respective meanings as set forth in the Servicing
Agreement. References herein to certain sections and subsections are references
to the respective sections of the Servicing Agreement.

                        Current BILLING MONTH: July 2002

<TABLE>
<CAPTION>

  CURRENT BILLING MONTH        7/3/2002 - 8/1/2002                                   COLLECTION CURVE 100%
  <S>                                                                           <C>                   <C>
   STANDARD BILLING FOR PRIOR BILLING MONTH
  Residential Total Billed                                                      $97,115,425
  Residential SECURITIZATION CHARGE (SC) Billed                                  $1,339,476           1.379%

  Commercial Total Billed                                                       $76,580,858
  Commercial SECURITIZATION CHARGE (SC) Billed                                   $1,395,240           1.822%

  Industrial Total Billed                                                       $54,465,444
  Industrial SECURITIZATION CHARGE (SC) Billed                                   $1,538,577           2.825%

   YTD NET WRITE-OFFS AS A % OF BILLED REVENUE
   Non-Residential Customer Net Write-offs                                         0.280%
   Residential Customer Net Write-offs                                             0.330%
   Total Net Write-offs                                                            0.300%



   AGGREGATE SC COLLECTIONS

  TOTAL SC REMITTED FOR BILLING MONTH
  Residential Class SC Collected                                                 $1,515,393
  Commercial Class SC Collected                                                  $1,488,003
  Industrial Class SC Collected                                                  $1,706,929

  Total SC Collected                                                             $4,710,325


   Aggregate SC Remittances for July 2002 BILLING MONTH                          $4,710,325
   Aggregate SC Remittances for August 2002 BILLING MONTH                                $0
   Aggregate SC Remittances for September 2002 BILLING MONTH                             $0
   TOTAL CURRENT SC REMITTANCES                                                  $4,710,325
</TABLE>





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<PAGE>


<TABLE>
<CAPTION>

  CURRENT BILLING MONTH        7/3/2002 - 8/1/2002                              COLLECTION CURVE 100%
  <S>                                                                           <C>
   CALCULATED SC COLLECTED AMOUNT
   RESIDENTIAL
   A-1 Residential SC Collected                                                  $1,442,085
   A-3 Residential T.O.D. SC Collected                                               $4,704
   A-4 Alternate Residence SC Collected                                             $37,661
   A-5 Residential Farm/Life Support SC Collected                                   $30,943

   TOTAL RESIDENTIAL SC COLLECTED                                                $1,515,393

   COMMERCIAL

   B-1 General Primary   (041) SC Collected                                         $28,317
   B-General Secondary   (010) SC Collected                                        $285,664
   C- General Secondary   (011) SC Collected                                       $543,197
   D-General Primary   (018) SC Collected                                          $355,244
   F-Primary High Load Factor   (032) SC Collected                                  $74,032
   GH-General Service Heating   (013) SC Collected                                   $4,660
   H- Water Heating Service   (014) SC Collected                                       $625
   L-1 General Energy-Only Street Lighting SC Collected                              $1,566
   L-2 General Service (Cust Owned) St Light SC Collected                            $1,648
   L-3 General Service (Co Owned) St Light SC Collected                              $8,400
   L-4 General Service Outdoor Lighting Commercial SC Collected                      $1,194
   PS-1 General Secondary Public Pumping SC Collected                                $7,859
   PS-2 General Primary Public Pumping SC Collected                                  $7,696
   PS-3 General Optional Primary Public Pumping SC Collected                        $44,262
   R-1 General Secondary Resale SC Collected                                           $122
   R-2 General Secondary Resale SC Collected                                         $1,089
   R-3 General Primary Resale SC Collected                                          $38,230
   ROA-P Retail Open Access Primary (110) SC Collected                              $58,559
   ROA-S Retail Open Access Secondary Com SC Collected                               $7,230
   SC - Special Contract Commercial SC Collected                                     $2,364
   SPEC Grand Rapids Special Contract SC Collected                                   $6,292
   UR-General Unmetered SC Collected                                                 $9,753

   TOTAL COMMERCIAL SC COLLECTED                                                 $1,488,003

   INDUSTRIAL

   B-1 General Primary   (042) SC Collected                                         $34,107
   B-General Secondary   (020) SC Collected                                         $40,765
   C- General Secondary   (021) SC Collected                                        $81,471
   CG-Cogeneration/Small Power Production Purchase SC Collected                     $10,513
   D-General Primary   (028) SC Collected                                          $707,167
   F-Primary High Load Factor   (033) SC Collected                                 $130,409
   GH-General Service Heating   (023) SC Collected                                      $39
   GMD General Motors SC Collected                                                  $59,540
   GMF General Motors SC Collected                                                 $144,230
   GMF-1 General Motors SC Collected                                                $17,325
   H- Water Heating Service   (024) SC Collected                                         $0
</TABLE>


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<PAGE>


<TABLE>
<CAPTION>

  CURRENT BILLING MONTH        7/3/2002 - 8/1/2002                          COLLECTION CURVE 100%
  <S>                                                                           <C>
   I-General Primary Interruptible   (034) SC Collected                              $1,355
   J-1General Alternative Electric Metal Melting SC Collected                       $60,349
   J-General Primary Electric Furnace   (037) SC Collected                           $7,447
   L-4 General Service Outdoor Lighting Industrial SC Collected                         $72
   ROA-P Retail Open Access Primary (111) SC Collected                             $259,969
   ROA-S Retail Open Access Secondary Ind SC Collected                               $1,163
   SC - Special Contract Industrial SC Collected                                   $151,008

   TOTAL INDUSTRIAL SC COLLECTED                                                 $1,706,929

   TOTAL SC COLLECTED                                                            $4,710,325
</TABLE>




   Executed as of this 20th day of August 2002.


                                              CONSUMERS ENERGY COMPANY
                                              AS SERVICER



                                                        /s/  Glenn Barba
                                              ----------------------------------
                                                     Glenn Barba, Controller



   CC:      Consumers Funding LLC
            Suite M-1079
            212 W. Michigan Ave
            Jackson, Mi  49201



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