Outbound-only monitoring leaves the receiving institution blind to mule activity, incoming scam payments, and the evidence needed to prove compliance. Under PSD3 and the PSR, that gap matters because liability can attach on both sides of the transfer. Teams need receiving-side triage, escalation, and documentation, not just sender-side fraud rules.
Why outgoing-only fraud monitoring misses the receiving side
Monitoring only the sending leg assumes fraud is fully visible where the transfer starts, but payment abuse often becomes clear only when the receiving institution sees the destination account, inbound pattern, and mule behaviour. That is where the control gap appears: the victim bank may spot the scam attempt, but the beneficiary bank may be the one that can confirm where funds landed, how fast they moved, and whether the account has other suspicious inflows.
Receiving-side visibility matters because fraud patterns are not symmetrical. Outbound-only rules can flag unusual payee creation, risky beneficiaries, or high-value transfers from the sender, but they will not reliably identify accounts that are receiving many small payments, acting as pass-through mule accounts, or accumulating scam proceeds across multiple victims. Without that view, the organisation can miss both containment and evidence collection.
When a transfer is disputed, the second bank often holds the most useful operational evidence, such as inbound timestamps, linked accounts, velocity patterns, and account history that can support investigation and reimbursement decisions. The Authorised Push Payment (APP) Fraud Guide is useful here because APP fraud controls are not just about stopping payments, but also about recognising scam inflows, mule behaviour, and reimbursement workflow evidence.
What compliance and liability gaps does that create?
Under PSD3 and the PSR, the issue is not only fraud detection quality, but also whether the institution can demonstrate that it handled its side of the transfer with appropriate monitoring, triage, and response. If only the sender side is instrumented, the receiving institution may lack the records needed to show what it saw, when it escalated, and whether it acted quickly enough on incoming scam proceeds.
That is why a one-sided control model can become a regulatory problem. Liability and operational responsibility can attach to both sides of the transfer, so the institution that receives the funds needs documented procedures for alert review, case handling, and preservation of evidence. A payments team that cannot explain inbound risk handling is weaker both for disputes and for supervisory review.
The Financial Services Identity Security Guide is relevant because the PSD3 and PSR environment sits alongside broader banking identity, access, and resilience obligations, while the EU Digital Operational Resilience Act (DORA) reinforces the need for traceable incident handling and third-party-aware operational controls in financial services.
What to add beyond sender-side fraud rules
Effective fraud monitoring needs receiving-side triage, not just sender-side scoring. That means inbound anomaly detection, mule-account screening, scam-proceeds patterns, and escalation paths that let operations teams freeze, review, or document suspicious inflows before funds are dispersed. It also means linking monitoring to case management so the organisation can show what it knew and what action it took.
Teams should also treat incoming scam payments as an investigation problem, not only a block-list problem. If the receiving bank sees unusual concentration of incoming transfers, rapid onward movement, or repeated deposits from unrelated senders, those signals should trigger manual review and evidence retention. The controls only work if they are paired with enough operational context to support reimbursement, reporting, and law-enforcement handoff where required.
The Top 10 Online Fraud Attacks is a helpful companion for understanding how APP scams sit alongside other fraud patterns, while FinCEN is useful for the AML and suspicious activity angle when inbound patterns suggest mule activity or laundering.
Risk and Threat Considerations
Outbound-only monitoring creates a blind spot that fraudsters can exploit by pushing funds into accounts designed for rapid dispersal, layering, or reuse across multiple scams. The main risk is not just missed detection, but delayed containment, weaker reimbursement decisions, and incomplete evidence when the receiving institution cannot reconstruct the inbound side of the event.
Failure mechanism: the receiving bank does not observe or triage suspicious inbound activity, so mule accounts, scam proceeds, and post-transfer dispersal continue unchecked while the sender-side controls assume the case is already covered.
Impact: more fraudulent funds escape, investigators lose the best available account-level evidence, and the organisation may be unable to support regulatory, reimbursement, or law-enforcement expectations on both sides of the transfer.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
NIST SP 800-53 Rev 5 and NIST CSF 2.0 set the technical controls, while ISO/IEC 27001:2022 defines the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-53 Rev 5 | AU-6 — Audit Review, Analysis, and Reporting | Inbound fraud cases need reviewable evidence and escalation trails. |
| AC-6 — Least Privilege | Fraud response should limit who can move or release suspicious inbound funds. | |
| IA-5 — Authenticator Management | Payment fraud cases often require handling credentials and access tied to monitored accounts. | |
| Recommendation — Correlate inbound payment alerts with audit records and case outcomes. Restrict approval and release rights for suspicious inbound payment cases. Rotate or revoke exposed credentials when inbound fraud indicates account compromise. | ||
| NIST CSF 2.0 | DE.AE — Anomalous Event Detection | Receiving-side monitoring is about detecting abnormal inbound payment behaviour. |
| RS.CO — Response Communications | Fraud monitoring gaps matter when teams must coordinate inbound fraud response and evidence sharing. | |
| RC.CO — Recovery Communications | Fraud containment and reimbursement depend on clear communications after suspicious transfers. | |
| Recommendation — Detect unusual inbound transfer patterns and escalate them for review. Coordinate case handling and evidence sharing across sending and receiving institutions. Document recovery actions and preserve transfer evidence for dispute handling. | ||
| ISO/IEC 27001:2022 | A.5.15 — Access control | Suspicious payment handling depends on controlled access to cases and release actions. |
| A.8.15 — Logging | The receiving side needs logs to prove what it saw and did during fraud triage. | |
| Recommendation — Limit who can approve, move, or close suspicious inbound payment cases. Log inbound alert handling and case actions for later review. | ||
Practitioner Guidance
What to verify: confirm that inbound fraud alerts exist for receiving accounts, that they feed a case workflow, and that operations can preserve evidence before funds are moved again. If the only alerts you can show are outbound, your control design is incomplete.
Decision rule: if a transfer pattern suggests mule behaviour, repeated scam inflows, or rapid onward movement, treat the receiving account as a live investigation object, not a passive destination. Escalate on inbound velocity and account behaviour, not only on sender-side risk scores.
Practitioner takeaway: The critical control is not “fraud detection at the point of send”, it is end-to-end visibility that lets the receiving side triage, contain, and prove what happened.
Related resources from NHI Mgmt Group
- Who is accountable when ACH fraud monitoring fails under the new rules?
- Who is accountable when fraud detection and compliance monitoring fail in a payments journey?
- Who is accountable when economic deterrence fails against fraud operations?
- How should banks design fraud monitoring so suspicious transfers can still be stopped before settlement?
Deepen Your Knowledge
Free weekly newsletter
Subscribe to the NHI & AI Identity Journal
The latest on NHI and Agentic AI security – articles, research, breaches, news and events every week.
Bonus 33% off our NHI Course when you subscribe.
Reviewed and updated by the NHIMG editorial team on October 22, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org