How to Increase Security for International Payments?

Security for international payments is one of the most underestimated risk categories in global business. In 2025, Business Email Compromise (BEC) attacks targeting wire transfers generated $3.05 billion in losses. Notably, 74% of organizations reported at least one BEC incident that year. For finance, treasury, and AP teams, the threat is no longer theoretical: it is a measurable operational cost.

This guide maps the five primary risk categories in cross-border B2B payments. Furthermore, it explains what controls reduce exposure in each category. Specifically, it outlines how platform architecture sets your security baseline before you implement any internal policies.

Key Takeaways

• BEC fraud generated $3.05 billion in losses in 2025, with the average requested wire transfer exceeding $50,000.
• SWIFT wire transfers are irreversible once settled. Therefore, pre-authorization controls are the only viable defense.
• Biometric liveness verification, real-time OFAC screening, and velocity anomaly detection are baseline requirements for any secure international payment platform.
• Multi-currency accounts reduce conversion events and, consequently, reduce FX-manipulation exposure.
• Moreover, a FinCEN-registered platform with automated structuring detection provides compliance controls that most SMB treasury teams cannot replicate internally.

Security for international payments starts with platform architecture

Most B2B payment security discussions focus on internal controls: approval workflows, dual authorization, and staff training. These matter. However, the foundational security layer is the infrastructure your payment platform operates on. Importantly, that infrastructure is not visible in the fee comparison table.

When evaluating security for international payments, consider these three infrastructure layers before reviewing product features. In fact, these layers determine most of your security posture before you configure a single internal control.

Layer 1: Regulatory registration and compliance obligations

A payment provider’s regulatory status defines the compliance standards it must meet. A FinCEN-registered Money Services Business (MSB) must maintain written AML policies under 31 CFR 1022.

In addition, it requires a designated Compliance Officer, ongoing transaction monitoring, and independent audit. A chartered bank faces identical pillars under 31 CFR 1020, but with stricter examiner scrutiny.

Traditional banks add compliance overhead without adding speed. Platforms operating outside FinCEN registration, however, offer no statutory compliance guarantee. Consequently, the sweet spot for business users is a FinCEN-registered platform that delivers bank-grade monitoring at MSB-level processing speed.

Bancoli, for instance, operates as a FinCEN-registered federal MSB with a written AML program, designated Compliance Officer, and independent audit under 31 CFR 1022. Additionally, FX fees and markup structures vary significantly between platform types. Compliance and cost are directly related.

Layer 2: KYB and counterparty verification depth

Your payment security depends on how rigorously your platform vets every business in the payment chain, including counterparties. A platform with shallow onboarding is a weak link. Consequently, look for KYB processes that verify entity tax ID, certificate of incorporation, and beneficial ownership (BOI).

Furthermore, look for photo ID with biometric liveness at ≥95% confidence. Automated pipelines, for example, can collect all four elements and complete biometric liveness verification in under 90 seconds, eliminating the tradeoff between rigor and speed.

Layer 3: Transaction monitoring intelligence

Several monitoring capabilities define whether a platform catches fraud before funds leave. These include real-time OFAC sanctions screening and structuring detection for sub-threshold splitting. In addition, velocity anomaly detection flags unusual volume spikes. High-value transaction holds, furthermore, apply to single payments above $1M. Together, these capabilities form the automated compliance layer your business inherits from the platform.

Five risk categories affecting security for international payments

Understanding where fraud and loss occur helps finance teams allocate their control budget correctly. Not all risk is equivalent, and not all controls apply to every category.

Each of the five categories below carries measurable financial exposure. Therefore, addressing all five (rather than only the most visible) produces the strongest overall security posture.

1. BEC fraud: the top threat to secure international payments

BEC remains the costliest attack vector in B2B payments. The sequence is consistent: attackers impersonate a vendor, CFO, or executive via spoofed email. They then request an urgent wire transfer to a new or modified bank account. Because SWIFT and Fedwire wires are irreversible once settled, the recovery window is narrow: often under 72 hours.

The FBI’s Financial Fraud Kill Chain (FFKC) achieved a 58% recovery rate in 2025. Specifically, it froze $679 million from $1.16 billion in attempted wire theft. As a result, 42% of attempted BEC amounts went unrecovered. For context, the average requested transfer in identified cases exceeded $50,000.

Controls that reduce BEC exposure:

• Callback verification protocols: Any change to a vendor’s bank account details requires verbal confirmation via a pre-established phone number. Specifically, this must not be a number supplied in the change request itself.
• Out-of-band approval: Payment instructions received by email must be authorized through a separate channel (secure portal, authenticator app) before processing. In other words, email alone cannot authorize a wire.
• Vendor account locking: Once a vendor’s payment details are verified and stored, changes require elevated authentication. Similarly, any modification must pass the same rigor as the original onboarding.

2. Structuring detection and financial crime exposure

Structuring means splitting large transactions into smaller amounts to avoid detection thresholds. It is both a fraud vector and a compliance liability. Consequently, platforms that lack automated structuring detection expose your business to payments involving illicit funds. The result is downstream regulatory risk, and a direct gap in the security for international payments you provide to suppliers and partners.

Effective transaction monitoring flags two or more sub-$10,000 payments within a 48-hour window when the combined total exceeds $10,000. Velocity anomaly detection, moreover, flags accounts where 7-day rolling volume exceeds 500% of the 90-day trailing average.

For businesses paying international suppliers regularly, this monitoring runs in the background. However, its absence means your platform cannot distinguish between a bulk payment run and coordinated layering activity.

3. OFAC and sanctions exposure

Paying a sanctioned entity, even unknowingly, can trigger significant penalties. OFAC maintains the Specially Designated Nationals (SDN) list covering individuals, companies, and jurisdictions. Standard SWIFT correspondent networks do not guarantee real-time OFAC screening. As a result, compliance responsibility often defaults to the originating bank, which may apply screening only at batch intervals.

Modern payment platforms run real-time OFAC screening on every transaction before release. This is distinct from periodic batch screening. Therefore, for businesses with high-volume supplier payment runs, real-time screening reduces the window during which a newly added designation could be missed.

4. FX manipulation: a hidden risk in security for international payments

A less-discussed but financially significant risk category is FX manipulation. Rate fraud occurs when a payment intermediary applies an undisclosed markup to the interbank exchange rate. Alternatively, conversion timing is manipulated to capture favorable rate movements at the client’s expense.

The primary defense is transparency. Platforms that apply 0% FX markup on standard currency corridors (EUR, GBP, AED, AUD, BRL, HKD, MXN, SGD, and 20+ others) eliminate opacity as an attack surface. Furthermore, multi-currency accounts let businesses receive, hold, and pay in the original currency. As a result, they remove the conversion event entirely, and with it, the FX manipulation window.

For businesses with recurring EUR or GBP payables, holding a balance in those currencies converts FX risk from a per-transaction variable to a managed treasury position. In short, fewer conversions means fewer attack surfaces.

5. Settlement finality and payment reversal risk

Payment reversal risk cuts both ways. From a fraud-prevention standpoint, irreversible settlements (SWIFT wires, Fedwire) mean a misdirected payment cannot be recalled. From a counterparty standpoint, however, reversible methods such as ACH and card networks expose the receiving business to chargebacks on shipped goods or rendered services.

Payment method security and reversal risk comparison

The practical implication: match payment method to transaction size and relationship trust level. For high-value transactions with new counterparties, wire transfers with pre-authorization controls provide finality guarantees. For recurring lower-value transactions with established counterparties, however, ACH provides cost efficiency with acceptable reversal risk.

How to build secure international payment approval workflows

Internal controls are the second layer of your security architecture. Even on a platform with strong compliance infrastructure, internal workflow design determines whether a BEC attack succeeds. Therefore, building deliberate approval workflows is not optional: it is foundational to secure international payments at scale.

Step 1: Segment payment authority by amount threshold

Define dollar thresholds for each authorization level. For example: transactions under $10,000 require a single approver. Amounts between $10,000 and $50,000 require dual authorization. Above $50,000, therefore, require CFO or controller sign-off with out-of-band confirmation. Adjust thresholds to your risk profile.

Step 2: Lock vendor payment details after verification

Implement a change-control process for vendor bank account information. Any modification requires re-verification through the original onboarding channel: not the channel that submitted the change request. This eliminates the BEC attack vector. Specifically, it blocks fraudsters who submit a fake account update via email before a scheduled payment. Moreover, once a verified account is locked in your payment system, modification requires a separate elevated auth flow.

Step 3: Apply multi-factor authentication to payment initiation

MFA on payment initiation adds friction that attackers cannot bypass with email alone. Authenticator app codes or hardware tokens are more secure than SMS-based codes. Notably, SMS codes are vulnerable to SIM-swapping attacks. For high-value payments, biometric authentication adds a layer that is tied to an individual, not a device.

Step 4: Run periodic payment data reconciliation

Reconcile payment records against vendor invoices on a defined cycle: weekly for high-volume operations, monthly at minimum. Discrepancies between expected payee data and actual wire destinations are the earliest indicator of payment diversion. These discrepancies often surface before other controls catch the issue. In addition, regular reconciliation produces an audit trail your compliance team can reference.

Step 5: Establish a payment freeze protocol

Define the conditions under which a payment can be suspended for additional review. These include unusual destination accounts, new banking relationships for existing vendors, and amounts that deviate significantly from historical averages. Additionally, flag requests arriving outside normal business hours. The protocol should specify who can release a held payment and what evidence is required.

Payment workflow security control matrix

Comparing security for international payments across platform types

The security capabilities available to your business depend on which payment infrastructure you use. Traditional banks, specialist fintechs, and multi-rail B2B platforms each offer different security profiles at different cost points.

The difference between real-time and batch compliance monitoring alone can determine whether a fraudulent transaction is caught before or after settlement. In other words, platform selection is a security decision, not just a cost decision. The table below compares the most relevant features for security for international payments across four platform types.

For a full comparison of payment rails and their cost and speed implications, see the international B2B payment methods compared guide.

Security feature comparison across platform types

What secure international payments look like in practice

Consider a US-based manufacturer paying three international suppliers: a EUR manufacturer in Germany (€85,000/month), a GBP logistics firm in the UK (£12,000/month), and an AED raw materials supplier in the UAE (AED 95,000/month).

Under a traditional bank model, each payment routes through SWIFT correspondent banks. OFAC screening may apply at batch intervals: not per transaction. FX conversion applies at the bank’s discretion, typically at a 1.5–3% markup. Moreover, each wire costs $25–$45 in fees. No structuring detection runs on the outbound chain.

Under Bancoli’s multi-currency account model, the same company holds EUR, GBP, and AED balances directly in the account. Monthly conversions replace per-transaction conversions. OFAC screening runs on every payment in real time.

Additionally, structuring detection monitors all incoming payment patterns automatically. Wire fees on the Plus plan are $25/transaction for SWIFT; Premium reduces this to $20. For USD ACH payables, the incoming fee on Plus is $1; on Premium it is $0. Conversion fees on Group 1 currencies are 0% within the monthly allowance, with a 0.5% surcharge on volume above the plan threshold.

The security improvement is not marginal: it is architectural. Therefore, the company moves from batch compliance to real-time compliance, from opaque FX to published rates, and from single-point authorization to auditable multi-person approval workflows. The compliance liability shifts from the business to the platform. This is what security for international payments looks like when platform infrastructure does the heavy lifting.

Frequently Asked Questions

What is the biggest security risk in international wire transfers?

Business Email Compromise (BEC) is the highest-cost threat. Attackers impersonate vendors or executives via spoofed email to redirect wire transfers to fraudulent accounts. Because international wire transfers (particularly SWIFT wires) are irreversible once settled, the recovery window is narrow. The FBI’s FFKC recovered 58% of flagged BEC amounts in 2025, leaving 42% unrecoverable. Pre-authorization controls, out-of-band payment approval, and locked vendor payment data are the primary defenses.

How does OFAC screening work in international payments?

OFAC (the Office of Foreign Assets Control) maintains the Specially Designated Nationals list of individuals, entities, and jurisdictions subject to US sanctions. Payment platforms with real-time compliance infrastructure screen every transaction against the SDN list before release. Traditional correspondent banking networks may apply OFAC screening only at batch intervals, creating a gap between a newly added designation and the next screening cycle. Businesses using platforms with real-time screening can reduce this gap to near zero.

What is the safest payment method for large B2B international transactions?

For high-value transactions with new counterparties, wire transfers (SWIFT or Fedwire) provide settlement finality: the payment cannot be reversed by the counterparty after settlement. However, this finality also means your business cannot reverse a misdirected wire. Mitigating this requires strong pre-authorization controls: dual-person approval, callback verification for new or changed bank account details, and MFA on payment initiation.

How do multi-currency accounts improve payment security?

Multi-currency accounts reduce the number of conversion events in your payment cycle. Fewer conversions mean fewer opportunities for FX rate manipulation and fewer intermediary touches on each transaction. Additionally, holding currency in the account currency of your supplier eliminates the correspondent bank chain that SWIFT payments typically traverse, reducing the number of intermediaries that touch the payment between origination and settlement.

What is structuring detection and why does it matter for B2B payments?

Structuring refers to breaking a large payment into multiple smaller transactions to avoid reporting thresholds. It is both a fraud vector (where illicit actors move money below detection limits) and a compliance liability, because receiving structured payments from a counterparty engaged in financial crime can create regulatory exposure for the receiving business. Platforms with automated structuring detection flag patterns where multiple sub-threshold transactions aggregate above $10,000 within a 48-hour window.

What compliance documentation should I request from my payment platform?

Request confirmation of the provider’s FinCEN registration number (or equivalent regulatory license), their AML program structure (written policies, designated Compliance Officer, transaction monitoring approach, independent audit schedule), and their KYB verification standards for business onboarding. For platforms operating in the US, FinCEN registration under 31 CFR 1022 establishes the legal baseline. Platforms operating as chartered banks face additional regulatory obligations under 31 CFR 1020 and state-level examination.