Liberty Mutual Surety

LIBERTY MUTUAL SURETY. LOCAL CONNECTIONS, GLOBAL REACH - Since 1893, Nationale Borg has been the bond supplier of the best businesses in the Netherlands and Belgium. Trusted clients that could expand their markets because our guarantees helped them to do their business fast and efficiently. After all, there is a reason why we are the largest bond supplier in the Netherlands and Belgium.

Nationale Borg is now Liberty Mutual Surety.

Since October 2019, Nationale Borg is part of Liberty Mutual Surety, a unit within Liberty Mutual Insurance. Liberty Mutual Surety is the largest surety in the world and one of the largest in the United States. With underwriting offices in 18 countries and bonds issued throughout the world, Liberty Mutual Surety has the ability, experience and resources to underwrite all types of contractors and corporations for local, regional, national and multinational customers. 

In business since 1912, and headquartered in Boston, Massachusetts, Liberty Mutual is the sixth largest global property and casualty insurer based on 2019 gross written premium and ranks 84th on the Fortune 100 list of largest corporations in the United States based on 2019 revenue. As of December 31, 2019, Liberty Mutual had $ 43.2 billion in annual consolidated revenue. 

Your company will not be burdened with capital being blocked

Working with Liberty Mutual Surety in the Netherlands offers you major advantages. In principle, we will not ask for collateral to cover your guarantee risk. We work on the basis of trust. A Liberty Mutual Surety guarantee, therefore, should not block any of your financial space leaving you free to deploy your working capital optimally. We specialize mainly in issuing performance guarantees and advance payment guarantees, as well as in issuing guarantees regarding import duties and excise duties.

Liberty Mutual Surety Your security in a world without guarantees

  • Backed by the financial strength, stability, and innovation of Liberty Mutual.

  • Formerly known as Nationale Borg in the Netherlands and Belgium.

  • Specializing in guarantees since 1893.

  • Flexible solutions customized to your needs.

  • Ability to scale a range of industries and project sizes.

  • With BorgOnline you can work fast and efficiently.

  • We strive to provide high quality and excellent service.

  • One point of contact enabling a personal and direct relationship.

As one of the largest providers of surety worldwide, we offer significant capacity and superior service, both locally and through our global network. Liberty Mutual has ratings of A from A.M. Best Company, A2 from Moody’s, and A from Standard & Poor’s.


Service Provider
Assembly, transport & Installation
Associated activities
Decommissioning & Recommissioning
Operations & Maintenance
Support Services
Construction & Installation
End-of-life & Decommissioning
Financial services
performance guarantee
advancepayment guarantee
custom bonds

About this Partner

Surety provider. Guarantees providing without collateral (opposed to banks) for offshore companies amongst others.


Visit address:
Gustav Mahlerlaan 348
1082 ME Amsterdam

Postal address:
PO Box 955
1000 AZ Amsterdam
The Netherlands

T: +31652681804