Exhibit (u)
MONTHLY CERTIFICATEHOLDERS' STATEMENT
DISCOVER CARD MASTER TRUST I
Series 2005-1 Monthly Statement
Class A Certificate CUSIP # 25466KFC8
Class B Certificate CUSIP # 25466KFD6
Distribution Date: December 15, 2005 Month Ending: November 30, 2005
Pursuant to the Series Supplement dated as of January 18, 2005,
as amended, relating to the Amended and Restated Pooling and
Servicing Agreement dated as of November 3, 2004 by and
between Discover Bank and U.S. Bank National Association,
as Trustee, the Trustee is required to prepare certain
information each month regarding current distributions to
investors and the performance of the Trust. We have set
forth below this information for the Distribution Date listed
above, as well as for the calendar month ended on the date
listed above.
1.Payments to investors in Series 2005-1 on this Distribution Date (per $1000
of Class Initial Investor Interest)
Series 2005-1 Total Interest Principal
Class A 30 days at 4.1250000% $3.437500000 $3.437500000 $0.000000000
Class B 30 days at 4.2650000% $3.554166667 $3.554166667 $0.000000000
2.Principal Receivables at the end of November, 2005
(a) Aggregate Investor Interest $23,528,409,000.00
Seller Interest $9,173,028,832.69
Total Master Trust $32,701,437,832.69
(b) Group One Investor Interest $23,528,409,000.00
(c) Group One Investor Interest for
Interchange Series $8,557,898,000.00
(d) Series 2005-1 Investor Interest $1,578,948,000.00
(e) Class A Investor Interest $1,500,000,000.00
Class B Investor Interest $78,948,000.00
3.Allocation of Receivables and other amounts collected
during November, 2005
Finance Charge Principal
Collections Collections Interchange
(a) Allocation between Investors and Seller:
Aggregate Investor Allocation$324,791,105.92 $4,380,090,482.50 $23,468,452.26
Seller Allocation $121,845,013.12 $1,643,185,950.54 $65,259,155.42
(b) Group One Allocation $324,791,105.92 $4,380,090,482.50 $23,468,452.26
(c) Series 2005-1 Allocation $21,796,289.24 $293,941,913.21 $4,329,995.98
(d) Class A Allocation $20,706,497.11 $279,245,118.71 $4,113,500.62
Class B Allocation $1,089,792.13 $14,696,794.50 $216,495.36
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(e) Principal Collections as a monthly percentage of Master
Trust Receivables at the beginning of November, 2005 18.38%
(f) Finance Charge Collections as a monthly percentage of Master
Trust Receivables at the beginning of November, 2005 1.36%
(g) Total Collections as a monthly percentage of Master
Trust Receivables at the beginning of November, 2005 19.74%
(h) Interchange as a monthly percentage of Master
Trust Receivables at the beginning of November, 2005 0.27%
(i) Total Collections and Interchange as a monthly
percentage of Master Trust Receivables at the
beginning of November, 2005 20.01%
4. Information Concerning the Series Principal Funding Account ("SPFA")
Deposits into the Deficit Amount
SPFA on this on this SPFA Investment
Distribution Date Distribution Date Balance Income
Series 2005-1 $0.00 $0.00 $0.00 $0.00
5. Information Concerning Amount of Controlled Liquidation Payments
Amount Paid on Deficit Amount on Total Payments
this this through this
Distribution Date Distribution Date Distribution Date
Series 2005-1 $0.00 $0.00 $0.00
6. Information Concerning the Series Interest Funding Account ("SIFA")
Deposits into the SIFA SIFA
on this Distribution Date Balance
Series 2005-1 $5,436,844.35 $0.00
7. Pool Factors for November, 2005
Class A 1.00000000
Class B 1.00000000
8.Investor Charged-Off Amount
Cumulative Investor
November, 2005 Charged-Off Amount
(a) Group One $152,318,866.12 $0.00
(b) Series 2005-1 $10,221,911.88 $0.00
(c) Class A $9,710,826.76 $0.00
Class B $511,085.12 $0.00
(d) As an annualized percentage of
Principal Receivables at the
beginning of November, 2005 7.77% N/A
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9.Investor Losses for November, 2005
Per $1,000 of Initial
Total Series Investor Interest
(a) Group One $0.00 $0.00
(b) Series 2005-1 $0.00 $0.00
(c) Class A $0.00 $0.00
Class B $0.00 $0.00
10. Reimbursement of Investor Losses for November, 2005
Per $1,000 of Initial
Total Series Investor Interest
(a) Group One $0.00 $0.00
(b) Series 2005-1 $0.00 $0.00
(c) Class A $0.00 $0.00
Class B $0.00 $0.00
11. Aggregate Amount of Unreimbursed Investor Losses for November, 2005
Per $1,000 of Initial
Total Series Investor Interest
(a) Group One $0.00 $0.00
(b) Series 2005-1 $0.00 $0.00
(c) Class A $0.00 $0.00
Class B $0.00 $0.00
12. Investor Monthly Servicing Fee payable on this Distribution Date
(a) Group One $39,214,014.98
(b) Series 2005-1 $2,631,580.00
(c) Class A $2,500,000.00
Class B $131,580.00
13. Class Available Subordinated Amount on this Distribution Date
As a Perecentage of
Total Class A Invested Amount
Series 2005-1, Class B $197,368,500.00 13.1579%
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14. Total Available Credit Enhancement Amounts
Shared Amount Class B Amount
(a) Maximum Amount on this Distribution Date $0.00 $118,421,100.00
(b) Available Amount on this Distribution Date $0.00 $118,421,100.00
(c) Amount of unreimbursed Drawings on Credit
Enhancement on this Distribution Date $0.00 $0.00
(d) Credit Enhancement Fee on this Distribution Date $54,198.25
15. Delinquency Summary
Master Trust Receivables Outstanding at the end of
November, 2005 $33,115,251,541.23
Delinquent Amount Perecentage of Ending
Payment Status Ending Balance Receivables Outstanding
30-59 Days $468,229,650.76 1.41%
60-179 Days $933,130,946.00 2.82%
(1)
16. Excess Spread Percentages on this Distribution Date
(a) Group One (2) 2.57%
(b) Interchange Subgroup (3) 5.86%
(c) Series 2005-1 (4) 5.91%
17. Net Principal Charge-Off Percentage on this
Distribution Date (5)
Charge-offs net of recoveries as an annualized percentage of
Principal Receivables at the beginning of November, 2005 6.80%
U.S. Bank National Association
as Trustee
BY:______________________________
Vice President
_____________________________________
(1) Investors should refer only to the highest of the Group
Excess Spread Percentage (Item 16(a)), the Interchange
Subgroup Excess Spread Percentage (Item 16(b)) and the
Series Excess Spread Percentage (Item 16(c)) in assessing
the current performance of the Trust and the Receivables.
If necessary, the Trust will use funds available from
series or subseries with positive Series Excess Spreads
to cover expenses (as detailed in note 4 below)for series
or subseries, if any, with negative Series Excess Spreads,
except that any such funds consisting of Interchange will
only be used to cover expenses for Interchange Series.
(2) Group Excess Spread is the sum of the Series Excess
Spreads for each series, including each subseries, in
the Group. The Group Excess Spread Percentage is equal
to the Group Excess Spread, multiplied by twelve,
divided by the Series Investor Interests at the
beginning of the period for each series, including each
subseries, in the Group.
(3) The Interchange Subgroup Excess Spread Percentage
is the sum of (i) all amounts deposited into the
Group Interchange Reallocation Account for all
Interchange Series and (ii) the Interchange Subgroup
Allocable Group Excess Spread (as such term is defined
in the Series Supplement between Discover Bank and
U.S. Bank National Association, as Trustee, for
each series, including each subseries), multiplied by
twelve, divided by the Series Investor Interest for
all Interchange Series at the beginning of each period.
(4) Series Excess Spread for this Series is the difference
between (a) the sum of Finance Charge Collections, Yield
Collections, Investment Income, Series Interchange and
Additional Funds for any Class of this Series (see
Item 3(c)), and (b) the sum of (i) the monthly interest
for this Series (see "Deposits into the SIFA on this
Distribution Date" in Item 6), (ii) the monthly servicing
fee for this Series (see Item 12(b)), (iii) the Investor
Charged-Off Amount (see Item 8(b)), and (iv) the Credit
Enhancement Fee (see Item 14(d)), in each case for
this Distribution Date. For purposes of determining
Group Excess Spread and the Interchange Subgroup
Shortfall Allocation Percentage, Series Excess Spread
is the amount calculated as described above minus
(i) if the Series Excess Spread for such series is
positive without giving effect to clause (i) of
this sentence, the lesser of Series Interchange or
the amount determined as the Series Excess Spread
without giving effect to this sentence; provided that
Series Excess Spread, for purposes of determining the
Group Excess Spread and the Interchange Subgroup
Shortfall Allocation Percentage, shall not be reduced
below zero as a result of this sentence. The Series
Excess Spread Percentage is equal to the Series
Excess Spread, multiplied by twelve, divided by
the Series Investor Interest for this Series at the
beginning of the period.
(5) For purposes of allocations to investors,
recoveries are treated as Finance Charge Collections
and are included as such in Item 3 above.
MASTER SERVICER'S CERTIFICATE STATEMENT
DISCOVER CARD MASTER TRUST I
Series 2005-1 Monthly Statement
CREDIT CARD
PASS-THROUGH CERTIFICATES
The undersigned, a duly authorized representative of Discover Bank,
as Master Servicer pursuant to the Amended and Restated Pooling &
Servicing Agreement dated as of November 3, 2004 (the 'Pooling &
Servicing Agreement') and the Series Supplement, dated as of
January 18, 2005, as amended (the 'Series Supplement') by and between
Discover Bank and U.S. Bank National Association, as Trustee, does
hereby certify as follows with respect to the Series Supplement for the
Discover Card Master Trust I, Series 2005-1 Master Trust
Certificates for the Distribution Date occurring on December 15, 2005:
1. Discover Bank is Master Servicer under the Pooling
and Servicing Agreement.
2. The undersigned is a Servicing Officer of Discover Bank as
Master Servicer.
3. The aggregate amount of Collections processed during
November, 2005 is equal to $6,469,912,552.08
4. The aggregate amount of Class A Principal Collections
processed during November, 2005 is equal to $279,245,118.71
5. The aggregate amount of Class A Finance Charge Collections
processed during November, 2005 is equal to $20,706,497.11
6. The aggregate amount of Class A Interchange processed
during November, 2005 is equal to $4,113,500.62
7. (a) The aggregate amount of Class A Principal Collections
recharacterized as Series Yield Collections during
November, 2005 is equal to $0.00
(b) The aggregate amount of Class A Additional Funds for
this Distribution date is equal to $0.00
8. The amount of drawings under the Credit Enhancement
required to be made and not immediately reimbursed on
the related Drawing Date pursuant to the Series
Supplement:
(a) with respect to the Class A Required Amount Shortfall
is equal to $0.00
(b) with respect to the Class A Cumulative Investor
Charged-Off Amount is equal to $0.00
(c) with respect to the Class A Investor Interest is equal to $0.00
9. The sum of all amounts payable to the Class A Certificateholders
on the current Distribution Date is equal to $5,156,250.00
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10.The aggregate amount of Class B Principal Collections
processed during November, 2005 is equal to $14,696,794.50
11.The aggregate amount of Class B Finance Charge Collections
processed during November, 2005 is equal to $1,089,792.13
12.The aggregate amount of Class B Interchange processed
during November, 2005 is equal to $216,495.36
13.(a) The aggregate amount of Class B Principal Collections
recharacterized as Series Yield Collections during
November, 2005 is equal to $0.00
(b) The aggregate amount of Class B Additional Funds for
this Distribution date is equal to $0.00
14.The amount of drawings under the Credit Enhancement
required to be made and not immediately reimbursed on
the related Drawing Date pursuant to the Series
Supplement:
(a) with respect to the Class B Required Amount Shortfall
is equal to $0.00
(b) with respect to the Class B Cumulative Investor
Charged-Off Amount is equal to $0.00
(c) with respect to the Class B Investor Interest is equal to $0.00
15.The sum of all amounts payable to the Class B Certificateholders
on the current Distribution Date is equal to $280,594.35
16. Attached hereto is a true copy of the statement required to be delivered
by the Master Servicer on the date of this Certificate to the Trustee
pursuant to the section entitled Master Servicer's Monthly Certificate
of the Series Supplement.
IN WITNESS WHEREOF, the undersigned has duly executed and delivered
certificate this 7th day of December, 2005.
Series 2005-1 DISCOVER BANK
as Master Servicer
By: /S/ Michael F. Rickert
___________________________________
Vice President, Chief Accounting
Officer, and Treasurer
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