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Guarantees that power global progress in the Netherlands


The team at Liberty Mutual Surety, formerly Nationale Borg, has been the surety provider for many leading companies in the Netherlands and Belgium for over 130 years. As the largest non-bank surety provider, we help our clients do business quickly and efficiently to expand their markets.

We have the capability, experience, and resources to support every type of business in providing guarantees to their local, national, and multinational clients.

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Global, market-leading solutions


Liberty Mutual Surety’s broad issuance capacities and expertise mean we respond effectively to the guarantee needs of businesses operating both domestically and internationally.

Our underwriters recognize that with changing business environments, fast and flexible access to guarantees is vital to our customers’ success. We pride ourselves on our deep market knowledge and industry expertise, which allow us to deliver superior customer service and develop long-term relationships.

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Capacity
Industry-leading capacity to support large, multi-jurisdictional programs
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Strong broker and client partnerships
Flexible solutions and programs designed to make it easy to work with us.
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Underwriting expertise
Deep, specialized, and consistent underwriting expertise across all types of bonds and guarantees
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Cross-border proficiency
Global Surety underwriting teams focused on reverse-flow, fronted transactions, and complex cross-border structures
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Financial strength
Backed by the financial strength of Liberty Mutual Group
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Industry engagement
Member of ICISA, PASA, and the Surety and Fidelity Association of America (SFAA)

By the numbers


From our financial strength to our local expertise and global reach, Liberty Mutual Surety has the products and capabilities to help your business succeed.
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Why choose a guarantee from Liberty Mutual Surety?


With our bonds and guarantees, your clients receive the certainty they seek, while you continue to focus on your core business. We operate globally, but provide tailored advice with our local expertise.

  1. Tailored solutions

As a market leader, we leverage our years of experience and knowledge to provide a suitable solution that alleviates your concerns and protects your reputation, both in the Netherlands and beyond.

  1. Reliable partner

We are your long-term partner, with over 130 years of history proving that we will always be there for you. Our S&P ‘A’ rating demonstrates that your clients and partners can rely on Liberty Mutual Surety.

  1. Additional source of financing

Our guarantees create additional financing capacity, alongside the credit from your bank. This offers more financial options and flexibility, especially when it comes to optimizing your (extra) working capital.

Explore All Guarantees
Constuction Risk Roundtable
Podcast • 12/18/25

Construction risk roundtable


In our construction risk roundtable series, we discuss issues and trends facing the industry and how companies can prepare.
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U.S. housing and global macroeconomic trends
Webinar • 05/01/25

U.S. housing and global macroeconomic trends


Expert panelists discuss the current housing market in the United States and the impact on construction and surety.
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Exploring the global risk landscape
Webinar • 03/05/25

Exploring the global risk landscape


Industry experts discuss the interconnectedness of risk around the globe and the future of the surety and construction industries.
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Effectively managing contractor risks
Report • 02/20/25

Effectively managing contractor risks


Contractors have faced a variety of risks since COVID-19. Collaborating with their surety has helped mitigate them.
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Dynamics of the Global Surety Market
Webinar, podcast • 10/22/24

Dynamics of the Global Surety market


Watch this informative webinar to learn about the differences among surety markets in Europe, Asia, Australia, and Canada.
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Elements of contractor distress
Webinar • 05/21/24

Elements of contractor distress


Learn more about the warning signs of contractor distress and how a surety and their claims team can help mitigate the risks present for an account.
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