Documents you sign every day
- Project and fee contracts
- Subcontracts with suppliers
- Progress and acceptance records
- Change orders and addenda
How Construction use it
When you win a bid or project
The construction contract and payment terms get signed before mobilizing the crew to site.
During execution
Extras, scope changes and progress records get signed in minutes with the client or subcontractors, without stopping the site.
When the project closes
The final handover record and settlement get signed and filed alongside the rest of the project documentation.
Before and after Firmiu
Why choose Firmiu
Agreements without delays
Clients and suppliers sign remotely, with no meetings.
Every stage documented
Keep signed records and contracts for the whole project.
Traceability
IP, date and verification back every signature.
How Firmiu works
Upload your PDF
Upload the document and enter the name and email of the person who must sign.
The signer receives a link
They get an email with a unique link and a verification code.
Signed document
The PDF is signed with its audit trail, ready to download.
Frequently asked questions
- Does it work for project contracts?
- Yes, and for subcontracts, records and private change orders.
- Can I sign with several suppliers?
- Yes. Each gets their unique link and signs without registering.
- Does it work across countries?
- Yes. Electronic signatures are recognized across Latin America, Spain and the US.
- Can I sign construction contracts with extras and annexes?
- Yes, you can merge the main contract with its annexes into a single PDF and send it for signature as one document.
- Does it work for agreements with subcontractors?
- Yes, you can use it for any document that needs a signature: client contracts, subcontractor agreements or progress records.
- Can I have multiple signers on the same construction contract?
- Yes, up to 5 signers per document, in parallel or in the order you set.
Guide reviewed and updated: July 2026.
Electronic signatures in your country
Related guides
How to sign a construction contract online
Construction involves many parties and documents. Learn to sign contracts and records online without stopping work.
How to sign a quote or estimate online
A signed quote is an approved job. Learn to get that signature online in minutes.
Electronic signature for businesses: a practical guide
Rolling out electronic signatures in your company saves time and paper. Here's where to start.
Digital signatures for other professions
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