# Surety / Personal guarantee

Source: https://contracko.com/glossary/surety

# Surety / Personal guarantee

A guarantor accessory promise to perform a debtor obligation if the debtor fails to do so.

## Definition

A surety (borgtocht) is a contract in which a guarantor undertakes to fulfil a debtor obligation towards a creditor if the debtor fails to perform. It is accessory to the principal debt, so the surety can invoke the debtor defences and is released if the main debt lapses. For a private individual standing surety outside the course of business, additional protective formalities and consent rules apply.

## Example

> A company director stands surety for a bank loan to the company, becoming personally liable if the company defaults.

## Why this is a business risk

A surety exposes the guarantor to personal or group-level financial liability for obligations they do not directly control. The scope and duration of the surety commitment are frequently underestimated at the time of signing, particularly when the underlying obligation can grow or extend. For creditors, a surety is only as strong as the guarantor's balance sheet, which may deteriorate over the contract term.

## How to manage it

- Define the maximum amount of the surety clearly; an unlimited surety is a significant risk and may be unenforceable in some circumstances.
- Specify the duration: does the surety terminate with the underlying contract, or does it continue for claims arising after termination?
- For a private individual surety, comply with the statutory formalities under BW 7:859, which require the surety to be established in writing and the amount to be stated in the guarantor's own hand.
- Obtain spousal or registered partner consent where required by law before accepting a personal surety from an individual.
- Monitor the financial health of the guarantor during the contract term and trigger a replacement security request if the guarantor's creditworthiness materially declines.

### How Contracko helps

Contracko extracts security terms, including surety obligations and their duration, from uploaded contracts and tracks them in the contract repository. Reminders ahead of the surety expiry or the underlying contract renewal ensure teams review whether the security remains adequate before the protection window closes.

## Legal references

- [BW 7:850 Dutch Civil Code: surety (borgtocht) Dutch law](https://wetten.overheid.nl/BWBR0005290)

Unless marked otherwise, references are to Dutch law (Burgerlijk Wetboek, the Dutch Civil Code); EU instruments such as the GDPR apply across the EU. This is general information, not legal advice. Other jurisdictions treat these concepts differently. Verify the current text and your situation with a qualified lawyer.

## Relevant for

[Financial Services](https://contracko.com/industries/financial-services)[Construction](https://contracko.com/industries/construction-industry)[Commercial Real Estate](https://contracko.com/industries/commercial-real-estate)

## Related clauses

- [Payment Terms Clause](https://contracko.com/clause-library/payment-terms)
- [Insurance Obligation Clause](https://contracko.com/clause-library/insurance-obligation)

## Related terms

- [Bank guarantee](https://contracko.com/glossary/bank-guarantee)
- [Parent company guarantee](https://contracko.com/glossary/parent-company-guarantee)
- [Pledge](https://contracko.com/glossary/pledge)
- [Payment default](https://contracko.com/glossary/payment-default)

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## Frequently asked questions

Common questions about this term.

- **Q:** What is the difference between a surety and a bank guarantee?
  **A:** A surety is accessory to the principal debt: the surety can raise the same defences as the debtor, and the obligation lapses if the main debt is extinguished. A bank guarantee is independent (abstract): the bank pays on a compliant demand regardless of the underlying dispute.

- **Q:** Can a surety be unlimited in amount?
  **A:** For a commercial surety, Dutch law does not prohibit an unlimited amount, but it is unusual and carries significant risk for the guarantor. For a private individual acting outside business, the amount must be stated in the guarantor's own writing under BW 7:859.

- **Q:** Is spousal consent always required for a personal surety?
  **A:** Under BW 1:88, a spouse or registered partner must consent to a surety given by the other partner if it does not form part of normal business activities. Without consent the surety can be annulled by the non-consenting spouse.

- **Q:** What rights does a surety have after paying the creditor?
  **A:** A surety who pays the creditor acquires a right of recourse (regres) against the principal debtor for the amount paid. The surety is also subrogated to the creditor's rights against the debtor to the extent of the payment made.

- **Q:** When is a parent company guarantee preferred over a bank guarantee?
  **A:** A parent company guarantee is preferred when the counterparty has a strong group balance sheet but the contracting entity is thinly capitalised, and when the cost of a bank guarantee (bank fees and credit facility usage) is a deterrent. However, a parent guarantee is only as strong as the parent, and it is not an on-demand instrument.

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