Internal Revenue Manual
IRM 2.3.68 — Command Codes DUPOL and DUPPG
Part 2. Information Technology
Chapter 3. IDRS Terminal Responses Section 68. Command Codes DUPOL and DUPPG 2.3.68 Command Codes DUPOL and DUPPG Manual Transmittal December 23, 2025 Purpose (1) This transmits revised IRM 2.3.68, IDRS Terminal Responses, Command Codes DUPOL and DUPPG Material Changes (1) 2.3.68.1 Updated mandatory Internal Controls (2) 2.3.68.2 Command Code DUPOL has a new definer for 2026; the options now are 4, 5 or 6. The definer reflects the desired processing year. (3) 2.3.68.4 Error responses have been updated, (n) and (p). (4) 2.3.68-1 Exhibit Description now shows updated list of acceptable definers. (5) 2.3.68-2 Exhibit Description now shows updated list of acceptable definers. (6) 2.3.68-3 Exhibit Description now shows updated list of acceptable definers. (7) 2.3.68-4 Exhibit Description now shows updated list of acceptable definers. (8) IRM 2.3.68 revised throughout to update organizational title Taxpayer Services. Effect on Other Documents IRM 2.3.68, dated November 20, 2023, is superseded. Audience IRS Tax Technicians, Account Management employees, and Criminal Investigator. Effective Date (01-02-2026) Kaschit Pandya Acting Chief Information Officer
Program Scope and Objectives
2.3.68.1 (12-17-2024) Program Scope and Objectives Overview: CFOL command code (CC) DUPOL is designed to research and display information to assist in fraud detection of SSNs in both paper and electronically filed returns. CC DUPOL extracts taxpayer information from the Duplicate TIN database that contains tax return information for the Tax Processing years 2023, 2024 and 2025. Command Code DUPPG is a subsidiary command code, and provides a second page–when available—of Duplicate TIN data once DUPOL has been used for the first page. Purpose: These sections provide instructions for accessing Duplicate TIN information through the Duplicate TIN (DUPTIN) database files in Martinsburg, WV. Audience: IRS Tax Technicians, Account Management employees, and Criminal Investigator Policy Owner: Director, Corporate Data Domain Program Owner: Tax Data On-line (TDOL), a branch within Corporate Data Domain Primary Stakeholders: Criminal Investigation (CI), Taxpayer Services (TS), and any other IRS organization profiled with IDRS access. Program Goals: As an aid to the detection of fraudulently-used Taxpayer ID numbers, these are the instructions for using the CFOL/IDRS command code DUPOL and its subsidiary paging-utility command code DUPPG. Details below.
Background
2.3.68.1.1 (01-02-2025) Background This IRM and the contained subsections provide the user the necessary information on how to use Command Codes DUPOL and DUPPG.
Authority
2.3.68.1.2 (01-02-2026) Authority Unified Work Request (UWR) 999071
Roles and Responsibilities
2.3.68.1.3 (01-02-2025) Roles and Responsibilities Applications Development (AD) is responsible for operations and maintenance of the command codes. Director, Corporate Data Domain Branch Chief, TDOL
Program Management and Review
2.3.68.1.4 (01-02-2025) Program Management and Review Project's data source is the Duplicate TIN (DUPTIN) DB2 database.
Program Controls
2.3.68.1.5 (01-02-2025) Program Controls Access to this program is governed by SACS.
Terms and Acronyms
2.3.68.1.6 (01-02-2025) Terms and Acronyms Acronym Definition CFOL Corporate Files Online DUPTIN Duplicate Taxpayer Identification Number DUPOL Duplicate TIN On-Line DUPPG Duplicate TIN On-Line Second Page IDRS Integrated Data Retrieval System IMF Individual Master File IPPIN Identity Theft Protection Pin IRS Internal Revenue Service ISPF Interactive System Productivity Facility IT Information Technology NAP National Account Profile SSN Social Security Number TDOL Tax Data On-line Branch TIN Tax Identification Number SACS Security and Communication(s) System
Related Resources
2.3.68.1.7 (01-02-2026) Related Resources Functional Specifications Package (FSP) 5.10.44.00, Command Code DUPOL/DUPPG
Command Code DUPOL Input Format
2.3.68.2 (01-02-2026) Command Code DUPOL Input Format The required input for CC DUPOL is: Command Code Command Code Definer (4, 5, or 6) TIN (edited or unedited SSN) TIN Type Code (also called 'validity digit'; values are blank or * only)
Command Code DUPOL Output Screens
2.3.68.3 (01-02-2025) Command Code DUPOL Output Screens Some of the features of the DUPOL command code output display screens include: CC DUPOL will display Nationwide and individual Service Center counts of how many times a particular SSN was used for the desired year. These counts will only be displayed on the first screen if multiple pages exist. CC DUPOL will display how many times the SSN was used, how it was used, and who used it. CC DUPOL will provide IDRS-like paging when multiple records exist. The paging routine will automatically position the cursor following the Start of Message symbol. When the ENTER key is depressed, the terminal will display the next page or any page designated by overlaying a page number onto the format by key input. Caution: Do not leave the terminal in a paging condition. Since no entry code is needed for input, anyone could depress the ENTER key and have unauthorized access to the display. Terminate terminal session by inputting SINOF.
Command Code DUPOL Error Screens
2.3.68.4 (01-02-2026) Command Code DUPOL Error Screens In the event of an error situation, one of the following messages will be issued: INVALID TIN REQUEST - Taxpayer Identification Number is improperly formatted or non-numeric. NO RECORD FOUND IN TABLE - There is no information for the requested Taxpayer Identification Number in the Duplicate TIN Database file. CHECK TIN AND RE-ENTER REQUEST - Check Taxpayer Identification Number and re-attempt request. DUPOL FILE NOT AVAILABLE - TRY LATER - The attempt to access the Duplicate TIN Database failed. UNSUCCESSFUL READ CAUSED BY TIME-OUT - The CC request was canceled due to the length of turnaround time. NO RECORD FOUND IN PRIMARY LINK TABLE - The requested SSN indicates multiple use but no information exist on file. ERROR DETECTED IN RETRIEVING DATA, CONTACT PROGRAMMER - The attempt to retrieve data from DB2 file encountered a severe error and the program abended. ERROR DETECTED WHILE OPENING CURSOR, CONTACT PROGRAMMER - The attempt to read multiple records resulted in a severe error. ERROR DETECTED WHILE CLOSING CURSOR, CONTACT PROGRAMMER - The attempt to close file resulted in a severe error. SQL ERROR ENCOUNTERED: (error code) - The program aborted due to a DB2 system error. Contact IBM Database Administration Section for frontline investigation and resolution. If further investigation cites a DB2 systems error, problem will be escalated to appropriate IBM Database Support Section by the production DBA as mandated by existing Service Level Agreements. A PAGING REQUEST WAS ENTERED BEFORE A DUPOL REQUEST WAS ENTERED - an attempt to retrieve an additional page was performed before an initial DUPOL request was made. NO SCREENS AVAILABLE - The attempt to retrieve an additional screen was unsuccessful, no additional screen exists. INVALID TRANSACTION REQUEST - The CC request was invalid due to a missing or invalid definer code. (n) PLAN DEFINER NOT AVAILABLE YET - A definer was used that is not one of the three current definers (4, 5, or 6). DB2 IS ENABLED BUT NOT CONNECTED YET - DB2 is available and enabled, but is not connected to CICS. DUPOL REQUIRES TRANS-ID DEFINER AND AN EDITED OR UNEDITED SSN often followed by EXAMPLE > DUPOLx WHERE x MUST BE 4, 5 or 6 - Definer is invalid and/or SSN not valid.
Command Code DUPOL Input Screen
Exhibit 2.3.68-1 Command Code DUPOL Input Screen This is the DUPOL input screen, showing the appropriate format for querying the DUPTIN database files in IDRS. Please click here for the text description of the image. Line Position Description 1 01–05 Command Code: DUPOL 1 06 Command Code Definer: (4, 5 or 6) 4 = Search 2023 Tax Processing Year (2023 Tax Return) 5 = Search 2024 Tax Processing Year (2024 Tax Return) 6 = Search 2025 Tax Processing Year (2025 Tax Return) 1 07–15, or 07–17 TIN (edited or unedited SSN) 1 16 or 18 TIN Type Code 'validity digit' (blank or * only)
Command Code DUPOL Response Screen
Exhibit 2.3.68-2 Command Code DUPOL Response Screen NOTE: This format is the initial response screen. If more records exist enter paging command DUPPG for additional screen. The initial response screen, as delivered by IDRS in response to a DUPOL query. Please click here for the text description of the image. Line Position Description 01 01–05 Command Code: DUPOL 01 06 Command Code Definer: (4,5 or 6) 01 07–15 TIN (Unedited SSN) 01 16 TIN Type Code 'validity digit' (blank or * only) 01 29–50 Screen literal 01 70–79 Date requested 03 02–29 Screen literal 03 31–35 Nationwide SSN usage count 03 54–57 Tax year of requested SSN 05 03–07 Service Center literal 05 09–12 Andover Service Center SSN usage count 05 19–23 Service Center literal 05 25–28 Austin Service Center SSN usage count 05 35–39 Service Center literal 05 41–44 Cincinnati Service Center SSN usage count 05 51–55 Service Center literal 05 57–60 Kansas City Service Center SSN usage count 05 67–71 Service Center literal 05 73–76 Ogden Service Center SSN usage count 06 03–07 Service Center literal 06 09–12 Atlanta Service Center SSN usage count 06 19–23 Service Center literal 06 25–28 Service Center SSN usage count 06 35–39 Service Center literal 06 41–44 Fresno Service Center SSN usage count 06 51–55 Service Center literal 06 57–60 Memphis Service Center SSN usage count 06 67–71 Service Center literal 06 73–76 Philadelphia Service Center SSN usage count 08 01–80 literal 09 01–80 literal 10 01–80 literal 11 01–80 literal 12–21 01–09 Abused SSN 12–21 12–21 File Location Code, either Service Center abbreviation or ITIN Status abbreviation, as appropriate. 12–21 25 System ID 12–21 30-32 Date added (Julian date). NOTE: Dates greater than 366 indicate the record was manually added in a subsequent year after the processing year has ended. 12–21 37–45 Primary SSN 12–21 49 Filing Status Code 12–21 57 Dependent Status Indicator 12–21 63–66 SSN Source Code 12–21 70–72 Reversal Date (if significant, indicates Julian date when the TIN was reversed due to tax return being rejected.) 12–21 77 Priority Code 24 22–25 Page number literal 24 27–29 Current screen number 24 31–32 Page literal 24 34–36 Total number of screens 24 49 Start of Message symbol 24 50–54 COMMAND CODE to retrieve additional screen 24 56–58 Next screen number
Command Code DUPPG Response Screen
Exhibit 2.3.68-3 Command Code DUPPG Response Screen Description: Screen layout to display additional page of abused SSN occurrences for requested TIN. This is the additional page, a response to requesting further DUPTIN information on IDRS by using supplemental command code DUPPG. Please click here for the text description of the image. Line Position Description 01 01–05 Command Code: DUPOL 01 06 Command Code Definer (4, 5 or 6) 01 07–15 TIN (Unedited SSN) 01 16 TIN Type Code 'validity digit' (blank or * only) 01 29–50 Screen literal 03 01–80 literal 04 01–80 literal 05 01–80 literal 06 01–80 literal 07–20 01–09 Abused SSN 07–20 12–21 File Location Code, either Service Center abbreviation or ITIN Status abbreviation, as appropriate. 07–20 25 System ID 07–20 28–30 Date added (Julian date). NOTE: Dates greater than 366 indicate the record was manually added in a subsequent year after the processing year has ended 07–20 37–45 Primary SSN 07–20 49 Filing Status Code 07–20 57 Dependent Status Indicator 07–20 63–66 SSN Source Code 07–20 70–72 Reversal Date (if significant, indicates Julian date when the TIN was reversed due to tax return being rejected.) 07–20 77 Priority Code 22 01–78 Additional usage message Note: Indicates if more than 24 records exist 24 22–25 Page number literal 24 27–29 Current screen number 24 31–32 Page literal 24 34–36 Total number of screens 24 49 Start of Message symbol 24 50–54 COMMAND CODE to retrieve additional screen 24 56–58 Next screen number
Command Code DUPOL Error Screen
Exhibit 2.3.68-4 Command Code DUPOL Error Screen Description: Screen layout for error messages. This is the error screen, issued in response to an IDRS query of DUPTIN, where there is a problem with the DUPOL/DUPPG request. Please click here for the text description of the image. Line Position Description 01 01–05 Command Code: DUPOL 01 06 Command Code Definer: (4, 5 or 6) 01 07–15 TIN (Unedited SSN) 01 16 TIN Type Code 'validity digit' (blank or * only) 01 27–48 Screen literal 01 60–69 Error date 22 01–70 Error message line 1: Possible responses: *INVALID SSN REQUEST *DUPOL FILE NOT AVAILABLE - TRY LATER *NO RECORD FOUND IN TABLE *NO RECORD FOUND IN PRIMARY LINK TABLE *UNSUCCESSFUL READ CAUSED BY TIME-OUT *ERROR DETECTED IN RETRIEVING DATA, CONTACT PROGRAMMER *ERROR DETECTED WHILE OPENING CURSOR *ERROR DETECTED WHILE CLOSING CURSOR * SQL ERROR ENCOUNTERED: [error code] *A PAGING REQUEST WAS ENTERED BEFORE A DUPOL REQUEST WAS ENTERED *PLAN DEFINER NOT AVAILABLE YET *DUPOL REQUIRES A TRANS-ID DEFINER AND AN EDITED OR UNEDITED SSN [ continued below] 23 01–70 Error message line 2 Possible responses: *CHECK TIN AND RE-ENTER REQUEST *DUPOL REQUIRES TRANS-ID DEFINER AND AN EDITED OR UNEDITED SSN *DB-2 IS ENABLED BUT NOT CONNECTED YET [continued from above] EXAMPLE> DUPOLx WHERE x MUST BE 4, 5 or 6.
Source: official text