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How fragmented AML/CFT and fraud investigations weaken SARs

Mary Ellen Biery
November 3, 2026
0 min read

SAR narratives are less thorough and helpful when info is scattered

Information about customers or members that sits across multiple systems leads to duplicate research and SAR narratives that lack detail explaining why the financial transaction is suspicious.

Strong SARs need a clear, unified review of risk

A suspicious activity report (SAR) is only as thorough as the investigation behind it.

How can fragmented financial crime investigations weaken a SAR? Information split across systems forces investigators to rebuild customer context manually, which leads to duplicate research and weaker narratives that lack needed detail to explain why the transaction is suspicious. Fraud and anti-money laundering/countering the financing of terrorism (AML/CFT) teams that review the same customer in separate systems can also miss related activity or create inconsistent decisions. Ultimately, the re-work, delays, and piecemeal information can culminate in limited management visibility, missed cases, and a SAR narrative that lists transactions without explaining the risk.

Watch the on-demand webinar, "The hidden cost of fragmented investigations."

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Abrigo's Kevin Gulledge, CAMS, a Principal Consultant who advises financial institutions on Bank Secrecy Act (BSA)/AML, fraud, and compliance programs, and Kimberly Harrison, CAMS, a Senior Financial Crimes Investigator with hands-on experience in BSA/AML investigations and SAR filings, explored the issue in a recent webinar on fragmented investigations. They offered the following advice for those working in AML/CFT and fraud areas at financial institutions.

Where the alert analysis splits

Investigators often work alert by alert while critical context sits somewhere else. Gulledge and Harrison said financial institutions experience several places where the customer or member story breaks apart:

  • Alerts are reviewed without access to related cases or prior dispositions.
  • Accounts and products are separated from customer relationship data.
  • Know your customer (KYC), ownership, and beneficial owner changes live in different systems.
  • Transaction activity is divided by channel, geography, or line of business.
  • Counterparties and connected customers or members are difficult to trace.
  • Investigator notes and rationale are not reusable in the next review.

A common scenario in which fragmentation extends investigations is when a colleague who worked on an alert has moved on from the institution, Harrison said. Nobody can explain the reasoning described in the notes, so the next investigator has to review the entire client relationship again. Multiply that by every handoff, and the duplicate research becomes a standing cost for a bank or credit union.

The time cost adds up. In an informal poll during the webinar, 47% of respondents said searching across systems for customer context takes the most investigative time. Another 32% named reconciling alerts, cases, and prior dispositions, and 15% named re-researching customers they had already reviewed.

“We're really spending a lot of time just collecting data,” Harrison said. “We've got all kinds of activities that can be costing us extra time and energy.”

The different goals of AML and fraud teams, especially when they operate separately, can also contribute to fragmentation. AML teams often measure success by their ability to maintain regulatory compliance through alert-to-SAR ratios, successful audits, and SAR or data quality. Fraud departments, meanwhile, may focus on providing the customer or member with a positive experience, including making sure the customer or member is protected. Fraud teams may also prioritize preventing losses to the bank or credit union and limiting work tied to false-positive alerts.

Fraud and AML teams often look for different red flags, too, even as they evaluate the same risk. Fraud teams watch for account takeovers, device changes, payment velocity, and mule behavior. AML/CFT red flags include signs of structuring, rapid movement of funds, unusual counterparties, specific geographies, and mismatching profiles. Without connecting red flags spotted across fraud and AML teams, investigators can miss valuable information that explains the risk.

How fragmentation shows up in a SAR

As noted above, the struggle to rework cases and rebuild context manually across alerts, systems, and teams can affect the quality and consistency of investigations. Analysts may struggle with inconsistent prioritization or escalation of alerts, or decisions may vary by investigator or channel.
Most importantly, assessing activity in isolation makes it easier to miss customer or member behavior and peer context (e.g., teller input) that may be vital to describing why transaction activity is suspicious.

Indeed, investigators may spend more time gathering facts than analyzing risk. And when they go to create the SAR, they may have only lists of transactions rather than enough information to explain the risk story. A complete picture combines who the customer or member is, what their normal transactional behavior is, and what the combined risk signals mean.

Inconsistent processes for communicating critical information also weaken analysis and SAR reporting.

Harrison, who works alerts, cases, and SARs for financial institutions, said templates support standardization and make comments easier to understand across alerts, cases, SARs, and enhanced due diligence reviews. Abrigo’s advisors can help financial institutions develop templates that are based on the same evidence structure, regardless of whether they’ll be used for investigation, escalation, or documentation.

Member-centric or customer-centric AML and fraud investigation will foster the kind of detail that helps investigators and law enforcement make connections across cases. Harrison recommends investigative teams start with the customer, then assemble the evidence explaining what happened, why it matters, and what action is appropriate.

Five steps to connect the details in a SAR

Five steps will connect the risk story from end to end and foster an investigation that strengthens SARs:

  1. Establish a baseline. Understand expected activity and the purpose of the relationship.
  2. Resolve identity. Link accounts, products, parties, and beneficial owners.
  3. Connect signals. Group alerts, cases, and events across channels and time.
  4. Test the story. Compare behavior with the customer profile and relevant typologies.
  5. Document the decision. Capture the rationale, the disposition, and a SAR-ready narrative.

What fragmentation means for audits and exams

SAR filing guidance from the Financial Crimes Enforcement Network (FinCEN) notes financial institutions must retain a copy of each SAR and the original or business-record equivalent of supporting documentation for five years. The rule also requires banks to make supporting documentation available to specified authorities upon request.

Fragmented information and investigations can create a practical challenge, Gulledge said. “Even if your decisions are reasonable, disconnected evidence is not going to make for a strong case,” he said. Institutions should be prepared for questions from auditors and examiners, including: Can the institution reproduce its decision? Were related alerts considered? Was escalation timely and consistent? Does the evidence support the SAR decision?

Addressing those questions can pose a documentation challenge. If the reasoning and source records are scattered, staff may have to piece the investigation back together during a review. Consistent case notes and a clear trail of evidence make it easier for another reviewer to understand the decision.

Solid SARs start with a shared customer view

Strong AML and fraud investigations give everyone the same information and foster useful SARs. A shared customer view can connect signals through common identity, linked accounts, counterparties, chronology, and prior decisions.

What should a single customer view include? Investigators need three views at once: customer identity and relationships, behavior over time, and risk and history. Gulledge said a single customer view should bring together:

  • Identity, ownership, and related parties
  • Accounts and products
  • Transactions and behavior
  • Alerts, cases, and SARs, along with their outcomes
  • Changes to the customer's risk profile over time
  • Notes, comments, and SAR history

Customer Hub, a new feature in Abrigo’s BAM+ solution, brings customer information, accounts, alerts, cases, SARs, and current transaction reports (CTRs) into one investigative workspace. Investigators can search by name, account number, CIS number or taxpayer ID number (TIN), and drill into alert and case details without leaving the workspace. The view also displays risk-rating trends and contributing factors. Relationship mapping and fund-flow features, which show account connections and how money moves across relationships, are available to AWS-hosted customers, Gulledge said.

When investigators can see the relevant relationship, activity, and prior decisions together and without requiring them to repeat searches, they have more to work with as they assess the alert and explain the basis for a SAR.

A shared customer view helps both fraud and AML/CFT teams improve performance and compliance, even when institutions keep AML/CFT and fraud roles and responsibilities separate. Shared risk context can mean fraud indicators lead to AML investigations, AML investigations improve fraud prevention, and teams can retain one source of information for audit purposes.

Key information in SARs

Useful SAR narratives answer who is involved, what happened, when and where it occurred, why it is suspicious, and how the activity moved, according to Gulledge and Harrison.

For a detailed description of how to structure SARs, see Abrigo’s guide to SAR narrative best practices. But the webinar provided a practical checklist that will help explain the customer relationship and make connections for law enforcement or others who may not know FinCrime professionals’ internal shorthand:

  1. Lead with the customer and relationship context.
  2. Describe the suspicious pattern rather than providing a “transaction dump” listing all the transactions without context.
  3. Explain connections among actors, accounts, channels, dates, and geographies.
  4. Explain why the activity is inconsistent or unusual, avoiding jargon in the explanation.
  5. Clearly state your investigative actions and the case disposition.

A strong narrative connects the actors, accounts, and channels, and it explains why the activity looks inconsistent with what the institution knows about the customer, Harrison said. Having a shared view of what the bank or credit union knows about the customer or member is a strong start.

This blog was written with the assistance of an AI large language model. It was reviewed and revised by Abrigo's subject-matter expert.

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Frequently asked questions (FAQs)

How can fragmented financial crime investigations weaken a SAR?

When customer context sits in separate systems, investigators spend time gathering facts and may assess related activity in isolation. Fragmented information can lead to inconsistent decisions and SARs that list transactions without explaining the risk story.

Do fraud and AML/CFT teams need to merge to have a single customer view?

No merger is required. Teams can share risk context while keeping roles and responsibilities separate. Fraud indicators can lead to AML/CFT investigations, AML/CFT investigations can improve fraud prevention, and both teams can work from one investigation and one source for audit purposes.

What should a SAR narrative include?

A strong narrative answers who is involved, what happened, when and where it occurred, why it is suspicious, and how the activity moved. It also describes the suspicious pattern, connects actors, accounts, channels, dates, and geographies, and states the investigative actions and disposition clearly.

Why do templates help avoid fragmented investigations and weak SARs?

Templates support standardization and make comments across alerts, cases, SARs, and due diligence reviews easier to understand.

What might financial institution examiners ask about fragmented evidence?

Institutions should be prepared for questions from auditors and examiners such as whether the decision from an alert can be reproduced, whether related alerts were considered, whether escalation was timely and consistent, and whether the documented evidence supports any SAR decision.

The information, content and materials provided through this website are for informational purposes only and are not intended to constitute legal advice. Customers should consult with their legal counsel regarding the application of laws and regulations to their specific circumstances.

About the Author

Mary Ellen Biery

Senior Strategist & Content Manager
Mary Ellen Biery is Senior Strategist & Content Manager at Abrigo, where she combines financial journalism, original research, and SEO/AEO strategy to create authoritative content that helps financial institutions manage risk and pursue growth. A former Dow Jones Newswires equities reporter, her work has appeared in The Wall Street Journal,

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About Abrigo

Abrigo enables U.S. financial institutions to support their communities through technology that fights financial crime, grows loans and deposits, and optimizes risk. Abrigo's platform centralizes the institution's data, creates a digital user experience, ensures compliance, and delivers efficiency for scale and profitable growth.

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