Tenant Template: Lost Key & Deposit in Austria

Deposit & blocked account 2 min read · published September 10, 2025
As a tenant in Austria, losing a key is often inconvenient and can affect the security deposit. This page clearly explains which immediate steps you should take, how to determine costs for a lock change, and what rights and obligations exist between tenant and landlord. You will receive practical advice on documenting damage, communicating with the landlord, and claiming your deposit after moving out. The information is based on applicable Austrian tenancy law and explains when it makes sense to consider legal action or use JustizOnline services. If unsure, we provide sample wording for a template letter to the landlord and refer to official sources.

What to do if you lose a key

A lost key can create security risks and potential costs. Act quickly: inform the landlord, check whether a replacement key is sufficient, and document all steps in writing. If you find the key, notify the landlord immediately.

  • Contact the landlord (contact) and report the loss.
  • Check whether a replacement key suffices or a lock change is required.
  • Clarify who covers the costs: tenant, landlord or insurance.
Inform your landlord in writing and keep a copy.

Security deposit and possible deductions

The deposit secures legitimate claims by the landlord. Not every expense can be deducted automatically; deductions must be transparent and evidenced. Tenancy law sets out basic duties and rights for rental contracts in Austria.[1]

  • The deposit may only be used for proven, legitimate costs.
  • Document damage with photos, invoices and receipts.
  • Observe deadlines for asserting claims.
Keep receipts to dispute unjustified deductions.

Communication and evidence

Written evidence (email with read receipt or registered letter) is often decisive. Record date, time and content of communications. Request confirmation from the landlord if you discuss cost responsibility or repairs.

  • Contact the landlord early and propose solutions.
  • Send written confirmations by email or registered mail.
Clear, documented communication reduces points of dispute.

FAQ

What happens if I lose the key?
The tenant must inform the landlord and will generally bear the costs if a replacement or lock change is required.
Can the landlord withhold the security deposit for a lock change?
Only proven, legitimate costs may be deducted from the deposit.[1]
How do I request my deposit back?
Send a written request to the landlord and, if unpaid, consider court action or JustizOnline services.[2]

How-To

  1. Inform the landlord immediately in writing and request confirmation.
  2. Photograph defective locks and collect receipts for expenses.
  3. Clarify who will cover costs: deposit, insurance or landlord.
  4. If no agreement is reached, consider the district court or a mediation service.

Key Takeaways

  • Documentation is the most important protection for tenants.
  • Observe deadlines to avoid losing legal rights.

Help and Support / Resources


  1. [1] RIS - Tenancy Law (MRG)
  2. [2] JustizOnline - Forms and e‑Services
Bob Jones
Bob Jones

Editor & Researcher, Tenant Rights Austria

Bob writes and reviews tenant law content for various regions. They’re passionate about housing justice and simplifying legal protections for tenants everywhere.