AML Record Keeping- A strategic foundation for compliance
Accountants, Blog

AML Record Keeping: A Strategic Foundation for Compliance 

The tension between keeping AML records for compliance and destroying them for data protection creates a legal minefield that most firms navigate incorrectly.
18 November 2025
7 Min Read
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Effective record keeping forms the backbone of any robust Anti-Money Laundering compliance programme. Under the UK Money Laundering Regulations 2017, regulated firms must maintain comprehensive documentation that not only demonstrates regulatory compliance, but also provides crucial evidence in the ongoing fight against financial crime. The importance of this obligation cannot be overstated, as record keeping extends far beyond a mere administrative burden. It represents a strategic function that enables firms to evidence their due diligence efforts, supports regulatory oversight, and facilitates law enforcement investigations into suspected financial crime. 

For many organisations, the challenge lies not simply in understanding what must be recorded, but in managing the practical tensions that arise between regulatory requirements and data protection obligations. This document addresses the key requirements governing AML record keeping and provides practical guidance on how firms can establish effective systems that balance compliance with responsible data management. 

Key Points Summarised for Busy Readers

  • Keep customer records for 5 years after relationship ends; transaction records for 5 years from transaction date

  • Maintain CDD documentation including ID copies, beneficial ownership verification, and ongoing monitoring records

  • Balance AML retention requirements with data protection by keeping records only as long as legally required

  • Store Suspicious Activity Reports separately from customer files and retain them longer than standard 5-year period

  • Ensure immediate access to all records when using third-party storage providers; firm retains ultimate responsibility

  • Record keeping enables regulatory compliance verification, supports law enforcement investigations, and helps identify suspicious patterns

How Long Must Records Be Kept?

The foundation of AML record keeping is established through Regulation 40 of the Money Laundering Regulations 2017, which establishes clear retention requirements. The basic rule is straightforward in principle: customer records must be kept for 5 years after the business relationship ends, whilst transaction records must be kept for 5 years from the date of the transaction. This 5-year period represents the standard retention window across the AML regulatory framework in the United Kingdom. 

Upon expiration of these prescribed periods, records should be securely destroyed unless there exists a legal reason to retain them for longer. Such legal reasons typically include ongoing court cases, formal investigations by law enforcement agencies, or regulatory inquiries.

Firms must establish robust procedures to ensure that records are destroyed securely at the end of their retention period. This destruction should be documented to demonstrate compliance with the regulations and to evidence that personal data has been appropriately disposed of in accordance with data protection principles. 

What Records Must Be Kept?

Record type What to keep safely
Customer Due Diligence (CDD) Copies of identification (passports, utility bills, etc.), Evidence of identity checks and beneficial ownership verification and ongoing monitoring
Enhanced Due Diligence (EDD) Source of wealth/funds documentation, MLRO approvals (especially for politically exposed persons and high-risk clients), Document authentication evidence and Risk assessments explaining why extra checks were required
Transaction Records Financial statements (originals or clear copies)
Crypto Asset Records Documents related to crypto asset transfers and Records of un-hosted wallet transfers
Risk Assessment Internal Firm-wide risk assessment reports and decisions

Unsure whether to apply Customer Due Diligence or Enhanced Due Diligence?

Learn the key differences and when each level of checks is required.

Learn About CDD vs EDD →

Balancing AML Requirements with Data Protection Obligations

A key challenge for many firms arises from the apparent tension between AML law, which requires records to be kept for extended periods, and data protection law, which requires that personal data be retained only for as long as necessary. This tension is resolved through a considered approach to data retention that respects both obligations. 

The practical solution involves keeping records only for the periods required by AML law, implementing robust protection mechanisms against unauthorised access, and ensuring that records are securely discarded when retention periods expire.

Records should only be kept longer than the standard 5-year period where there is a valid legal reason such as an ongoing investigation or court proceedings. This approach ensures compliance with both AML requirements and data protection principles. The firm must be transparent about its retention practices and ensure that customers are informed about how long their personal data will be retained. 

Management of Suspicious Activity Reports

Suspicious Activity Reports occupy a special position within AML record keeping requirements. Whilst the Money Laundering Regulations 2017 does not specify exact time limits for retaining SAR records, best practice and prudent risk management dictate that these records should be kept for extended periods. There are several sound reasons for this approach. 

Firstly, SAR records provide crucial evidence that the firm has complied with its reporting obligations and has followed the correct procedures in identifying and reporting suspicious activity. Secondly, these records can defend the firm against accusations of regulatory breaches or failures in compliance. Thirdly, many SARs lead to law enforcement investigations that can extend over years, and retention of original SAR records can support such investigations. It is therefore prudent to retain SAR records for longer than the standard 5-year period, particularly where investigations remain ongoing. 

Importantly, SAR records must be stored separately from normal customer files to prevent inadvertent disclosure of ongoing investigations. This segregation is important both for legal reasons and to protect the integrity of potential law enforcement investigations. The firm should establish secure systems for SAR storage that limit access to appropriate personnel and ensure that ordinary customer service staff do not inadvertently discover or disclose the fact that a SAR has been filed. 

Spotting Suspicious Activity: Know the Red Flags

Understanding what triggers a Suspicious Activity Report is essential for effective AML compliance. Learn how to identify warning signs and fulfill your reporting obligations correctly.

Read About SAR Red Flags →

Managing Records Through Third Parties

Many firms outsource elements of their AML compliance work to third-party service providers, including record storage and management.

Where outsourcing occurs, the firm retains ultimate responsibility for ensuring that records are maintained in compliance with regulatory requirements. This principle is important because regulatory authorities will hold the firm accountable for compliance regardless of whether work has been outsourced. 

Where a firm uses third-party providers, it must ensure that it retains immediate access to all records at any time. This means establishing systems whereby records can be retrieved promptly to satisfy regulatory inquiries or support law enforcement investigations.

The firm should verify that the third party meets applicable regulatory standards and can demonstrate that they handle records securely and in compliance with all relevant obligations. Furthermore, the firm should establish a contingency plan if the third party goes out of business or becomes unable to fulfil its obligations. Such contingency planning might include maintaining backup copies or establishing alternative access arrangements. 

The Broader Purpose of Record Keeping

Record keeping serves multiple critical functions within the AML framework that extend beyond mere regulatory compliance. Effective record keeping enables regulatory authorities to verify compliance during inspections and examinations.

It supports law enforcement investigations into suspicious activities by providing detailed documentation of customer relationships and transactions. For the firm itself, comprehensive records provide essential audit trails that demonstrate due diligence efforts and support the firm’s ability to evidence that it has followed appropriate procedures. 

Beyond these compliance functions, strategic record keeping enhances an organisation’s ability to identify patterns of suspicious behaviour and respond effectively to emerging financial crime risks.

Well-maintained records enable the firm to analyse trends, identify weaknesses in its procedures, and improve its systems over time. Records can also support internal investigations, help the firm defend against accusations of regulatory failures, and provide crucial evidence if the firm becomes subject to legal proceedings. 

Want to learn more about AML compliance?

Read our comprehensive guide that covers everything related to AML and ID verification requirements for accountants.

Read the 2025 AML Guide →

Conclusion

Good record keeping is not simply about avoiding regulatory penalties or satisfying compliance requirements. Rather, it represents a strategic function that helps firms detect, prevent and respond to financial crime. By maintaining the right records for the appropriate periods and protecting them properly against unauthorised access, firms contribute meaningfully to the broader fight against money laundering and terrorist financing. The establishment of robust record keeping systems demonstrates an organisation’s commitment to compliance and positions the firm to respond effectively to regulatory inquiries, support law enforcement efforts, and maintain the integrity of the financial system. For any organisation serious about its AML compliance responsibilities, strategic record keeping forms an indispensable foundation. 

Frequently Asked Questions

How long should AML records be kept?

AML records must be kept for 5 years after the business relationship ends or the transaction date. However, Suspicious Activity Reports (SARs) may need to be kept longer based on legal or investigative requirements.

How to store AML records?

AML records should be stored securely, either physically or electronically, ensuring they are accessible for regulatory reviews and law enforcement inquiries. Third-party storage is allowed, but the firm remains responsible for compliance.

What records should be kept for 7 years?

Records related to high-risk clients or ongoing investigations, such as Enhanced Due Diligence (EDD) and certain transactions, should be kept for 7 years, as per BSA record retention requirements.

What is the $3000 rule?

The $3000 rule requires financial institutions to file a Suspicious Activity Report (SAR) for transactions of $3000 or more that may involve illegal activity. Records of these transactions must be retained per BSA record retention requirements.

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