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: December 2001 CURRENT BILLING MONTH 12/4/01 - 1/4/02 COLLECTION CURVE 40.08% STANDARD BILLING FOR PRIOR BILLING MONTH Residential Total Billed $99,905,303 Residential SECURITIZATION CHARGE (SC) Billed $1,301,723 1.303% Commercial Total Billed $76,206,947 Commercial SC Billed $1,351,308 1.773% Industrial Total Billed $58,032,315 Industrial SC Billed $1,506,277 2.596% YTD NET WRITE-OFFS AS A % OF BILLED REVENUE Non-Residential Customer Net Write-offs 0.150% Residential Customer Net Write-offs 0.350% Total Net Write-offs 0.220% AGGREGATE SC COLLECTIONS TOTAL SC REMITTED FOR BILLING MONTH Residential Class SC Collected $567,534 Commercial Class SC Collected $550,347 Industrial Class SC Collected $514,368 Total SC Collected $1,632,249 Aggregate SC Remittances for December BILLING MONTH $1,632,249 Aggregate SC Remittances for January BILLING MONTH $0 Aggregate SC Remittances for February BILLING MONTH $0 TOTAL CURRENT SC REMITTANCES $1,632,249 Page 1 of 3 CURRENT BILLING MONTH 12/4/01 - 1/4/02 COLLECTION CURVE 40.08% CALCULATED SC COLLECTED AMOUNT RESIDENTIAL A-1 Residential SC Collected $539,876 A-3 Residential T.O.D. SC Collected $1,781 A-4 Alternate Residence SC Collected $12,666 A-5 Residential Farm/Life Support SC Collected $13,211 TOTAL RESIDENTIAL SC COLLECTED $567,534 COMMERCIAL B-1 General Primary (041) SC Collected $8,089 B-General Secondary (010) SC Collected $103,304 C- General Secondary (011) SC Collected $197,223 D-General Primary (018) SC Collected $114,753 F-Primary High Load Factor (032) SC Collected $28,901 GH-General Service Heating (013) SC Collected $2,060 H- Water Heating Service (014) SC Collected $194 L-1 General Energy-Only Street Lighting SC Collected $1,188 L-2 General Service (Cust Owned) St Light SC Collected $2,354 L-3 General Service (Co Owned) St Light SC Collected $6,535 L-4 General Service Outdoor Lighting Commercial SC $889 PS-1 General Secondary Public Pumping SC Collected $2,996 PS-2 General Primary Public Pumping SC Collected $2,316 PS-3 General Optional Primary Public Pumping SC Collected $17,988 R-1 General Secondary Resale SC Collected $22 R-2 General Secondary Resale SC Collected $348 R-3 General Primary Resale SC Collected $15,657 ROA-P Retail Open Access Primary (110) SC Collected $35,974 ROA-S Retail Open Access Secondary Rate SC Collected $3,932 SC - Special Contract Commercial SC Collected $862 SPEC Grand Rapids Special Contract SC Collected $1,192 UR-General Unmetered SC Collected $3,570 TOTAL COMMERCIAL SC COLLECTED $550,347 INDUSTRIAL B-1 General Primary (042) SC Collected $7,452 B-General Secondary (020) SC Collected $15,886 C- General Secondary (021) SC Collected $31,123 CG-Cogeneration/Small Power Production Purchase SC $304 DA - General Service Direct Access (896) SC Collected $5,667 D-General Primary (028) SC Collected $260,140 F-Primary High Load Factor (033) SC Collected $36,584 GH-General Service Heating (023) SC Collected $16 GMD General Motors SC Collected $16,916 GMF General Motors SC Collected $14,154 GMF-1 General Motors SC Collected $12,581 Page 2 of 3 CURRENT BILLING MONTH 12/4/01 - 1/4/02 COLLECTION CURVE 40.08% GMJ-1 General Motors SC Collected $3,800 H- Water Heating Service (024) SC Collected $1 I-General Primary Interruptible (034) SC Collected $2 J-1General Alternative Electric Metal Melting SC Collected $10,020 J-General Primary Electric Furnace (037) SC Collected $2,062 L-4 General Service Outdoor Lighting Industrial SC Collected $750 ROA-P Retail Open Access Primary (111) SC Collected $13,016 ROA-S Retail Open Access Secondary Rate SC Collected $35 SC - Special Contract Industrial SC Collected $83,859 TOTAL INDUSTRIAL SC COLLECTED $514,368 TOTAL SC COLLECTED $1,632,249 Executed as of this 17th day of January 2002. CONSUMERS ENERGY COMPANY AS SERVICER s/ Glenn P. Barba ------------------------------- Glenn Barba, Controller Copy: Consumers Funding LLC Suite M-1079 212 W. Michigan Ave Jackson, MI 49201 Page 3 of 3