The Probation Extension Letter is a crucial document in Dutch employment relationships when an employer needs additional time to evaluate an employee's suitability for a position. It is typically used when the initial probationary period has not provided sufficient opportunity to assess the employee's performance or when specific improvement areas have been identified but require more time for evaluation. The document must comply with Dutch employment law, particularly the Dutch Civil Code (Burgerlijk Wetboek) provisions regarding probationary periods. The letter should clearly state the extension duration, reasons for extension, performance expectations, and support measures to be provided. It serves as both a legal document and a performance management tool, requiring careful consideration of employee rights and employer obligations under Dutch law.

1. Letter Header: Company letterhead, date, employee's name and address

2. Subject Line: Clear indication that this is a Probation Extension Letter

3. Reference to Original Employment Contract: Details of the original employment contract including start date and initial probation period

4. Reason for Extension: Clear explanation of why the probation period needs to be extended, including specific examples or areas for improvement

5. New Probation Terms: Specific details about the extension period duration and end date

6. Performance Expectations: Clear outline of the performance improvements or objectives expected during the extended probation period

7. Support and Evaluation: Description of how the employee will be supported and evaluated during the extended period

8. Legal Compliance Statement: Reference to relevant Dutch labor law provisions permitting the extension

9. Acknowledgment Section: Space for both employer and employee signatures to confirm mutual agreement