Four-eyes review

Four-eyes review (the "four-eyes principle" or maker-checker control) means that a decision or action is prepared by one person and checked by a second, independent person before it takes effect. In KYB, the first analyst reviews the case and makes a recommendation; a second analyst or approver checks the work and the evidence before the account is approved, declined or escalated.

Why it matters in KYB review

KYB decisions involve judgment: whether an ownership chain is complete, whether a screening hit is a true match, whether a business model makes sense. A single reviewer under queue pressure can miss things or drift from policy. A second reviewer catches errors, keeps decisions consistent across the team, and makes it harder for one person to wave through a case, whether by mistake or on purpose. It also creates a clear record of who decided what.

What the second reviewer checks

• Completeness. Every required element is present: entity, identifiers, all beneficial owners, the control person, screening, business model.
• Evidence behind each conclusion. Follow a sample of findings back to their sources in the evidence packet, prioritizing the ones that drive the recommendation.
• Screening dispositions. Each potential match resolved with a stated reason.
• Policy fit. Risk rating, required approvals and any exceptions match written policy.
• The recommendation itself. Would the checker reach the same outcome from the same evidence? If not, the disagreement and its resolution go in the file.

Common pitfalls

• Rubber-stamping. A checker who approves hundreds of cases a day without opening the evidence adds a signature and very little control. Track override and send-back rates to see whether review is real.
• Checker and maker not independent. The same person under two logins, or a checker who reports to the maker, defeats the purpose.
• Checking the conclusion only. Reading the summary and not the sources misses the errors that matter.
• No trail. If the file does not show who checked, when and what they changed, the control cannot be demonstrated.
• Bottlenecks. When only one senior person can approve, the queue waits for them. Plan checker capacity like maker capacity. See KYB manual review queue.

Related terms

Evidence packet, business onboarding review, KYB manual review queue, request for information (RFI).

How Sweat AI fits

Sweat AI prepares the review: its analysts, working with AI tools, assemble the evidence and the recommendation. Your team remains the decision-maker, and the evidence packet is built so your checker can verify each finding quickly. See KYB review.