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Return Review Program catches refund fraud that older filters missed

TIGTA found that IRS Return Review Program identity-theft models alone selected $1.88 billion, or 47.8%, of $3.92 billion in confirmed identity-theft refunds in 2015.

22
Benefit status
Reported
Evidence
Independently studied
Observed
Sources
2 publications

Benefits

Benefit

Selected $1.88 billion, or 47.8%, of $3.92 billion in confirmed identity-theft refunds

Awaiting review

Outcome identifiers

Unresolved

Not reviewedUnresolved

Category

Improved Task Accuracy

Awaiting review

Status

Reported benefit

Awaiting review

Beneficiary groups

Organizations. Society.

Awaiting review

Beneficiaries

Unresolved

Not reviewedUnresolved

Reach

Unresolved

Not reviewedUnresolved

Distribution and access

Unresolved

Not reviewedUnresolved

Duration

Unresolved

Not reviewedUnresolved

Expected?

Yes

Awaiting review

Costs and harms

Unresolved

Not reviewedUnresolved

AI system

System

IRS Return Review Program (RRP) identity-theft models

Awaiting review

Model

This is an explicit unresolved assignment: the sources on record do not settle this question.

Not reviewedUnresolved

Release

Unresolved

Not reviewedUnresolved

Provider

Unresolved

Not reviewedUnresolved

Role

Unresolved

Not reviewedUnresolved

Configuration

Unresolved

Not reviewedUnresolved

Inputs and outputs

Unresolved

Not reviewedUnresolved

Autonomy

Unresolved

Not reviewedUnresolved

Workflow

The IRS screened every individual return that claimed a refund before paying it. The models used prior-year returns and third-party information returns such as W-2 forms. IRS staff adjusted the models and the fraud score settings to balance fraud caught against legitimate refunds delayed.

Awaiting review

Human oversight

Unresolved

Not reviewedUnresolved

Relation to AI

The audit compares which fraud detection system selected each confirmed return. It does not compare the program with no screening, and the program also uses business rules besides its machine-learning models.

Awaiting review

AI contribution

Unresolved

Not reviewedUnresolved

Measurement

Studies

Other. [1]

Fully reviewed: supporting details for Studies

Review date: 29 October 2026.

Sources: [1]

Study design

Other. [1]

Fully reviewed: supporting details for Study design

Review date: 29 October 2026.

Sources: [1]

Measurement

Audit of IRS filing-season data on which detection systems selected each confirmed identity-theft return. [1]

Fully reviewed: supporting details for Measurement

Review date: 29 October 2026.

Sources: [1]

Setting and sample

700,560 confirmed identity-theft returns, 2015 filing season. [1]

Fully reviewed: supporting details for Setting and sample

Review date: 29 October 2026.

Sources: [1]

Measures

Dollar value of confirmed identity-theft returns selected only by each system. [1]

Fully reviewed: supporting details for Measures

Review date: 29 October 2026.

Sources: [1]

Comparison

Electronic Fraud Detection System and the Dependent Database. [1]

Fully reviewed: supporting details for Comparison

Review date: 29 October 2026.

Sources: [1]

Results

$1.88 billion (47.8%) unique to the Return Review Program models against $60 million (1.5%) unique to the older system. [1]

Fully reviewed: supporting details for Results

Review date: 29 October 2026.

Sources: [1]

Additional value from AI

Not isolated from the program's business rules. [1]

Fully reviewed: supporting details for Additional value from AI

Review date: 29 October 2026.

Sources: [1]

Limitations

Figures come from IRS data; selections by manual processes are not counted; parts of the report are redacted; no comparison with no screening. [1]

Fully reviewed: supporting details for Limitations

Review date: 29 October 2026.

Sources: [1]

Denominators

All electronically filed individual returns claiming refunds. [1]

Fully reviewed: supporting details for Denominators

Review date: 29 October 2026.

Sources: [1]

Materials for replication

None public. [1]

Fully reviewed: supporting details for Materials for replication

Review date: 29 October 2026.

Sources: [1]

Money

Kind of value

The kind of monetary value is unclear.

Not reviewedUnresolved

Amount

The monetary value is not established.

Not reviewedUnresolved

Currency and prices

The currency and price basis are unclear.

Not reviewedUnresolved

Period and unit

The period and unit of the monetary estimate are unclear.

Not reviewedUnresolved

Realization

Whether the monetary value was realized is unclear.

Not reviewedUnresolved

Recipients and payers

The recipients and payers are unclear.

Not reviewedUnresolved

Gross or net

Whether the monetary figure includes costs is unclear.

Not reviewedUnresolved

Included costs

The costs included in the estimate are unclear.

Not reviewedUnresolved

Comparison

The financial comparison is not established.

Not reviewedUnresolved

Method

The method used to calculate monetary value is unclear.

Not reviewedUnresolved

Return and payback

The return on investment or payback period is not established.

Not reviewedUnresolved

People and places

Participants

Developer: Internal Revenue Service (Information Technology organization and Office of Research, Applied Analytics, and Statistics). Operator: Internal Revenue Service.

Awaiting review

Jurisdictions

Benefit: United States (national). Developer: United States. Operator: United States.

Awaiting review

Ownership and control

Unresolved

Not reviewedUnresolved

Dependencies

Unresolved

Not reviewedUnresolved

Cross-border connections

Unresolved

Not reviewedUnresolved

Geopolitical implications

The geopolitical implications are unclear.

Not reviewedUnresolved

Follow-up

Conditions for replication

Prior-year returns and third-party data must be available when new returns are scored. Score settings must keep false detections low enough that legitimate taxpayers are not burdened.

Awaiting review

Replication attempts

1 follow-up entry. Benefit recurred: 1.

Awaiting review

Later findings

24 July 2018. GAO relays IRS figures showing that the program kept stopping invalid refunds through November 2017.

Awaiting review

Availability

Unresolved

Not reviewedUnresolved

Institutional decision

A relevant institutional decision has not been established.

Not reviewedUnresolved

Grounds

The grounds for an institutional decision are unclear.

Not reviewedUnresolved

Action and result

The result of an institutional decision is not established.

Not reviewedUnresolved

Success criterion

The criterion for a successful institutional decision is unclear.

Not reviewedUnresolved

Evidence

Source numbers

AIBD-0635-source-0001–0002

Awaiting review

Citations

Numbered references below.

Awaiting review

Language

Unresolved

Not reviewedUnresolved

Source relationships

Independent

Awaiting review

Original evidence

Unresolved

Not reviewedUnresolved

Access and versions

Unresolved

Not reviewedUnresolved

Supported findings

Unresolved

Not reviewedUnresolved

Evidence strength

Independently studied. Sources: two independent reports. The cited evidence includes no finding by a regulator or court. [1] [2]

Fully reviewed: supporting details for Evidence strength

Review date: 29 October 2026.

Sources: [1] [2]

Missing evidence

Unresolved

Not reviewedUnresolved

Grades

Assessed benefits

Organizations. Society.

Awaiting review

Depth

Organizations: 2. Society: 2.

Awaiting review

Reasons

Organizations: The program's identity-theft models were the only system to select $1.88 billion of the $3.92 billion in confirmed identity-theft refunds in the 2015 filing season. Society: The IRS reports that the program prevented more than $6.51 billion in invalid refunds from January 2015 to November 2017, as relayed by GAO.

Awaiting review

Observed or intended

Unresolved

Not reviewedUnresolved

Rubric

Unresolved

Not reviewedUnresolved

Assessor and date

Unresolved

Not reviewedUnresolved

Alternative assessments

Unresolved

Not reviewedUnresolved

Fill

Independently studied

Awaiting review

Entry details

Kind

The case describes a program or activity. The record describes a national screening program assessed by auditors. [1]

Fully reviewed: supporting details for Kind

Review date: 29 October 2026.

Sources: [1]

Field

Tax administration.

Awaiting review

Purpose

The Return Review Program was built to detect identity-theft and other refund fraud before the IRS issues refunds. The benefit is that purpose.

Awaiting review

Dates

Observed: 2015. Updated: 29 October 2026.

Awaiting review

Stage

The system was in routine use. The program screens refund returns nationally in every filing season. [1]

Fully reviewed: supporting details for Stage

Review date: 29 October 2026.

Sources: [1]

Version

SHA-256: 02a05a45be81…

Awaiting review: supporting details for Version

SHA-256 of the public case, its assessments, and its displayed answers and notes, excluding its own identifier and the derived coverage summary.

References

Other identifiers

AI Incident Database: 101.

Awaiting review

Category mappings

Unresolved

Not reviewedUnresolved

Citable summary

Unresolved

Not reviewedUnresolved

Revisions

2 revisions. Latest: 29 October 2026.

Awaiting review

Sources

  1. Report Independent author

    Treasury Inspector General for Tax Administration. The Return Review Program Increases Fraud Detection; However, Full Retirement of the Electronic Fraud Detection System Will Be Delayed. Reference Number 2017-20-080, 25 September 2017.

  2. Report Independent author

    U.S. Government Accountability Office. Tax Fraud and Noncompliance: IRS Could Further Leverage the Return Review Program to Strengthen Tax Enforcement. GAO-18-544, July 2018.

Cite this case

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Version 02a05a45be81, archived in the edition of 29 October 2026

Benefit marks

Depth

The number and color show the depth of a benefit.

  1. Depth 1. A convenience, or time or money saved.
  2. Depth 2. A measurable improvement in a result or ability.
  3. Depth 3. A lasting change, an ability restored, or a risk removed.
  4. Depth 4. A serious harm averted or a serious condition resolved in time.
  5. Depth 5. A life or livelihood preserved, or a change documented across a population.

Beneficiary

  • Circle: a person
  • Square: an organization
  • Triangle: society

Evidence

  • Solid. A court or regulator found a benefit, or researchers independently studied it.

  • Hatched. Independent reporting.

  • Outline. Claimed by the parties. Only the people or organizations involved, or sources whose independence has not been assessed, support the benefit.

The fill changes with the evidence. The depth color stays the same.

How benefits are assessed