Is the electronic signature legally valid?

Electronic signatures are legally recognized in most Latin American countries for most private contracts and agreements, and Firmiu generates an audit trail (IP, date, device and verification code) that backs every signature. Specific validity depends on the country and the document type: some, such as notarized documents or wills, require additional formalities. Firmiu is a simple electronic signature: it is backed by that audit trail, not by a certificate issued in the signer's name by an accredited authority, which is what laws such as Argentina's or Costa Rica's call a “digital signature”. Firmiu does not provide legal advice.

Do I need to install any software?

No. Firmiu works 100% in the browser. No software or plugins need to be installed on your computer or mobile device.

How does the signer know the document is legitimate?

When signing, the signer receives a 6-digit verification code by email that expires within minutes and works only once. Only whoever controls that email can complete the signature, which backs the document's authenticity.

What if the signer doesn't have a Firmiu account?

The signer doesn't need to create an account. They receive the unique link by email and sign directly from the browser, without registering.

How long does it take to sign a document?

The entire process takes less than 2 minutes: the signer receives the email, opens the link, draws their signature, and enters the verification code.

Can I sign from a mobile phone?

Yes. The process is optimized for mobile devices. The signer can draw their signature with their finger directly on the touch screen.

Where are my documents stored?

Your documents are stored encrypted on secure servers with AES-256 encryption. Only you and authorized signers can access them.

Can I try Firmiu for free?

Yes. The free plan includes 3 documents per month with no credit card required. You can upgrade at any time when you need more capacity.

In which Latin American countries are electronic signatures recognized?

Electronic signatures are recognized by the laws of the main Latin American countries, including Mexico, Colombia, Argentina, Chile, Peru, Costa Rica, Guatemala, Ecuador, Honduras, El Salvador, Bolivia, Paraguay, Uruguay, Panama, the Dominican Republic, Nicaragua, Venezuela, Cuba and Brazil. The exact scope varies with each country's legislation and the document type; see our legal-validity-by-country guide.

Does Firmiu comply with data protection regulations?

Yes. Firmiu complies with the General Data Protection Regulation (GDPR) of the European Union and applicable local data protection laws across Latin America. Your documents are stored with AES-256 encryption, accessible only by you and authorized signers. We do not sell or share your data with third parties.

Professionals from different fields signing documents digitally with Firmiu

Electronic signing for Latin America

Sign documents in seconds

Send any PDF to your clients for digital signing. No printers, no scanners, no hassle.

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Three steps to sign

The simplest process to sign documents electronically with legal backing.

Upload the PDF

Load the document from your computer and enter the signer's email.

Signer receives the link

An automatic email is sent with a unique link. When signing, the person confirms with a one-time code sent to that same email.

Signed PDF ready

Download the document with the embedded signature and full audit trail.

Everything you need

Firmiu has everything to manage your electronic signatures professionally.

Legal backing

Electronic signatures recognized by Latin American e-signature laws for most private contracts.

100% cloud-based

No installations or plugins. Works from any browser and device.

Full audit trail

Records IP, date, time, device and geographic location for every signature.

Automatic delivery

Signer receives the link by email. You get notified when they sign.

Verifiable integrity

Every signed PDF carries a cryptographic signature and its SHA-256 fingerprint. Anyone can check at firmiu.com/en/verify that the document was not altered.

Easy to use

Interface designed for accountants, lawyers, and real estate professionals. No learning curve.

Professionals collaborating on documents

Firmiu in your country

Built for professionals across Latin America

Accountants, lawyers, real estate agents and small businesses: see what your country's law says about e-signatures and how they're used in your profession.

countries with an e-signature guide

professions with their own guide

ES · EN

emails and signing page in each signer's language

Simple, transparent pricing

No hidden fees. Cancel anytime. Pick your plan by the volume you need.

Free

$0/ month

To try Firmiu with no commitment

3 documents per month
1 PDF per send
Up to 5 signers per document
Certificate with SHA-256 hash
Public document verification
Email support

Essential

$15/ month

For independent professionals

30 documents per month
Up to 5 PDFs per send
Up to 5 signers per document
Automatic 48h reminders
Templates for contracts, letters and receipts
Contacts, archive and the metrics panel
Everything in Free
Priority support

Why Firmiu over the alternatives

Concrete product facts, not promises.

50 MB

PDFs up to 50 MB

Firmiu accepts documents up to 50 MB per send, the same as DocuSign's web app and more than Dropbox Sign's 40 MB (according to each one's documentation, October 2026). A full scanned file fits without splitting it.

SHA-256

An integrity certificate on every document

When the last signer is done, a certificate page is added with the document's SHA-256 fingerprint, its folio, and the date, IP, device and location of each signature.

Accounts your client has to create

The signer opens a link, draws or uploads their signature and confirms with a code sent to their email. No sign-up, nothing to install, works on mobile.

Frequently asked questions

Everything you need to know about digital signing with Firmiu.

Is the electronic signature legally valid?: Electronic signatures are legally recognized in most Latin American countries for most private contracts and agreements, and Firmiu generates an audit trail (IP, date, device and verification code) that backs every signature. Specific validity depends on the country and the document type: some, such as notarized documents or wills, require additional formalities. Firmiu is a simple electronic signature: it is backed by that audit trail, not by a certificate issued in the signer's name by an accredited authority, which is what laws such as Argentina's or Costa Rica's call a “digital signature”. Firmiu does not provide legal advice.
Do I need to install any software?: No. Firmiu works 100% in the browser. No software or plugins need to be installed on your computer or mobile device.
How does the signer know the document is legitimate?: When signing, the signer receives a 6-digit verification code by email that expires within minutes and works only once. Only whoever controls that email can complete the signature, which backs the document's authenticity.
What if the signer doesn't have a Firmiu account?: The signer doesn't need to create an account. They receive the unique link by email and sign directly from the browser, without registering.
How long does it take to sign a document?: The entire process takes less than 2 minutes: the signer receives the email, opens the link, draws their signature, and enters the verification code.
Can I sign from a mobile phone?: Yes. The process is optimized for mobile devices. The signer can draw their signature with their finger directly on the touch screen.
Where are my documents stored?: Your documents are stored encrypted on secure servers with AES-256 encryption. Only you and authorized signers can access them.
Can I try Firmiu for free?: Yes. The free plan includes 3 documents per month with no credit card required. You can upgrade at any time when you need more capacity.
In which Latin American countries are electronic signatures recognized?: Electronic signatures are recognized by the laws of the main Latin American countries, including Mexico, Colombia, Argentina, Chile, Peru, Costa Rica, Guatemala, Ecuador, Honduras, El Salvador, Bolivia, Paraguay, Uruguay, Panama, the Dominican Republic, Nicaragua, Venezuela, Cuba and Brazil. The exact scope varies with each country's legislation and the document type; see our legal-validity-by-country guide.
Does Firmiu comply with data protection regulations?: Yes. Firmiu complies with the General Data Protection Regulation (GDPR) of the European Union and applicable local data protection laws across Latin America. Your documents are stored with AES-256 encryption, accessible only by you and authorized signers. We do not sell or share your data with third parties.

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