The Costly Mistakes in Rental Agreements: Lessons from Spanish Courts

When a residential lease ends in Costa Adeje or anywhere else in Spain, the handover of keys is usually treated as a quick, routine formality. However, as highlighted by recent rulings in Spanish courts (such as Sentencia nº 39/2026from the Provincial Court of Barcelona), that final moment—and how the contract was initiated—often triggers costly legal disputes between landlords and tenants.

Both parties frequently lose thousands of euros simply due to poor documentation, unwritten agreements, and a reliance on verbal trust rather than solid proof.

Here are the most common mistakes that cost money in rental relationships, and how to handle them correctly whether you are a property owner or a tenant:

1. The Missing Inventory Trap

• The Mistake: Handing over keys without a detailed, signed inventory and dated photographic evidence. Courts consistently rule that without an initial written inventory, a landlord cannot prove that specific furniture, appliances, or fittings actually existed in the property at the start of the lease. Conversely, tenants have faced severe difficulties when furnishings vanished or disputed items appeared out of nowhere.
• The Correct Way: Always draft a comprehensive inventory signed by both parties on day one, supplemented by clear, dated photographs of every room, appliance, and piece of furniture.

2. Verbal Damage Reports Do Not Exist

• The Mistake: Notifying the landlord or agency of a breakdown (such as a faulty washing machine, broken heater, or plumbing issue) purely through casual phone calls or verbal chats. In legal disputes, unwritten claims carry zero weight, leaving tenants responsible for accumulated damage they never officially reported.
• The Correct Way: Report any defect or required repair immediately in writing (preferably via email or certified communication), ensuring there is a clear date stamp and a written response from the property manager or landlord.

3. Relying on Verbal Approvals or “Remodeling Promises”

• The Mistake: Relying on casual phone conversations or text messages saying “do whatever you like with the place” or “don’t worry about minor wear and tear.” Verbal permissions hold no validity in a courtroom.
• The Correct Way: Always demand explicit, written authorization and signed amendments before making any structural changes, repainting, or discarding old fixtures in a rental property.

4. Confusing Estimates (Presupuestos) with Actual Invoices

• The Mistake: Presenting a cost estimate or repair quote as proof of actual monetary damage during legal claims. Courts routinely reject unverified estimates because they only show what a repair might cost, not what was actually paid or executed.
• The Correct Way: Always keep official, paid tax invoices (facturas) and payment receipts for any professional repair or replacement work. Estimates alone will lead to dismissed claims in court.

5. Informal Handover of Keys and Meter Readings

• The Mistake: Handing back the keys informally or writing a self-drafted note without recording utility meter statuses or the definitive physical condition of the property.
• The Correct Way: Execute a formal, signed property exit protocol (acta de entrega de llaves) detailing the exact condition of the premises and logging the final electricity, water, and gas meter readings.

6. Raising New Claims Too Late

• The Mistake: Remaining silent about property flaws or furniture disputes throughout the tenancy or preliminary hearings, only to bring them up for the first time during an appeal. Under Spanish civil procedure, arguments or expert reports introduced too late in the judicial process are legally inadmissible.
• The Correct Way: Put everything on the table from the very beginning. Do not leave critical evidence or formal objections to chance or late-stage surprises.

A Practical Rule for Both Landlords and Tenants

Put everything in writing, signed by both parties on every single page—no matter how lengthy the document is—and never rely on blind trust or the famous “we’ll figure it out as we go” attitude. People are rarely acting in bad faith from day one, but human memory becomes surprisingly selective when money is involved.

Note: While highlighted through recent Spanish court jurisprudence, these legal principles and documentation rules apply generally across rental markets in Spain, including Tenerife and Costa Adeje.