How to sign a lease agreement online

Updated guide · August 2026 · 4 min read

Quick answer: the landlord uploads the contract, marks where the tenant must sign, signs their own part and sends a link. The tenant opens it on their phone, signs at the marked spots and both download the signed copy. No printing, no scanning and no need to meet in person. In Spain this type of signature is valid for a residential lease between private parties.

Renting a flat usually means matching diaries to sign in person, or the print–sign–scan loop twice over. When the tenant still lives in another city, it can drag on for weeks. Signing online solves both.

Is an electronically signed lease valid?

Yes. Spanish law does not require a residential lease to be signed by hand or before a notary: the agreement between the parties is enough and it can be recorded electronically. A simple electronic signature is valid between landlord and tenant and is commonly used.

Worth knowing: a simple electronic signature is valid, but if a serious dispute arises, what matters is being able to prove who signed and when. For high-value contracts or delicate situations, consider a digital certificate or professional advice. This guide is informative and not legal advice.

Steps for landlord and tenant

Prepare the contract as a PDF (or upload the Word file and it will be converted).
Upload it to iSignYourDocuments choosing "Send it to be signed".
Mark the signature fields. Place the tenant's (📍 Client's) and your own (✍️ I sign). Leases are usually signed on the last page and often on each page of the inventory.
Sign your part before sending: the tenant receives it already signed by the landlord.
Send the link by WhatsApp or email.
The tenant signs from their phone and both download the signed copy within 7 days.

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What to check before signing a lease

Term and renewals: how long it lasts and how it renews or ends.
Rent and indexation: amount, payment day and yearly update.
Deposit and guarantees: how much and under what conditions it is returned.
Costs: who pays community fees, property tax, utilities and minor repairs.
Condition of the property: an inventory or photos attached avoids arguments later.
Correct details: names, ID numbers and the exact address.

Frequently asked questions

Can we each sign from a different city?

Yes, that is exactly the case it solves best. Each party signs from their own device, at their own time.

What if the contract has annexes or an inventory?

Upload them all and generate a single link. The tenant signs them one after another with a progress bar.

Does the lease need registering?

Registering it at the Land Registry is not compulsory, though it can be advisable. Depositing the deposit with the regional authority usually is: check your region's rules.