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The Rent Increase Letter Due To Inflation is a critical document in Swiss property management, used when landlords need to adjust rental rates in response to inflation as measured by the Swiss Consumer Price Index. This document is strictly regulated under Swiss federal and cantonal laws, requiring specific forms and procedures to be valid. It's typically used during periods of significant inflation or when landlords haven't adjusted rents for an extended period. The letter must include precise calculations based on official inflation figures, current and new rent amounts, effective dates, and mandatory legal notices. It serves as both a formal notification and a legal document, ensuring transparency in rental relationships while protecting both landlord and tenant rights under Swiss law. The document must be served with appropriate notice periods and can only be used when the increase can be justified by actual inflation rates.

1. Sender Details: Full name and address of the landlord or property management company

2. Recipient Details: Tenant's full name and rental property address

3. Date: Date of the notice, which is crucial for calculating notice periods

4. Property Identification: Clear identification of the rental property including apartment number if applicable

5. Current Rent Information: Details of the current rent and any included ancillary charges

6. Rent Increase Declaration: Clear statement of the new rent amount and the percentage increase

7. Inflation Justification: Specific reference to the Swiss Consumer Price Index figures justifying the increase

8. Effective Date: The date when the rent increase will take effect, considering legal notice periods

9. Legal Notices: Mandatory information about the tenant's right to challenge the increase within 30 days