Product

Galilei Sign: the signature that lives inside the file

E-signature stopped being a separate subscription and a round trip of PDFs over email. The envelope is born in the file, gets signed with no account, and returns to the Folder on its own — sealed, with its certificate.

Katia Valdés Katia Valdés Co-founder & CTO, Galilei Systems August 19, 2026 · 3 min read · Updated August 29, 2026

Almost every brokerage pays for e-signature twice. Once in money, with a per-user subscription that bills whether you use it or not, sometimes with a per-document charge on top. And once in friction: the PDF leaves the file, travels by email, comes back signed into somebody inbox, and sits there until someone remembers to upload it again to where it belonged in the first place.

The second invoice is the expensive one. A signed document living in an agent inbox is a document the brokerage does not have.

The envelope is born where the business is

Galilei Sign is not an integration: it is part of the file. Upload the contract or pick a template from the library, add the signers in the order they circulate, and the platform detects where the signatures, initials, and dates go. You confirm, and it goes out.

The documents you repeat become templates with the fields already placed and the file data already filled in: client name, address, price, agent. The template says "Client 1 signs here", not a proper name, so the next envelope goes out in seconds and with your brokerage letterhead on it.

Signing should not require creating an account

Your client gets a single-use link, reviews the document, and signs from their phone: they draw it, type it in a script face, or reuse the one they already adopted. No signups, no passwords to remember, no extra excuse to delay the closing. In Spanish or in English, depending on the document — which in Florida is not a cosmetic detail.

The boring part is the part that holds the closing up

Every signature leaves evidence: who signed, when, from where, and what they accepted. The audit certificate travels attached to the document, and behind it there is an append-only, hash-chained log — the technical way of saying that any later alteration shows. Electronic consent is stored per signer, on the ESIGN and UETA frameworks.

On top of that, the PDF goes out cryptographically sealed with a timestamp from an external authority. If anyone touches a comma after signing, the signature is invalidated in any reader. This is where precision matters, because it is the point the industry tends to oversell: our sealing certificate is our own, not bought from a commercial authority, so Adobe shows an "identity unknown" notice instead of a green check. What holds the document up in front of whoever audits it is the chained log and the audit certificate, not the padlock in the viewer.

And the documents we block on purpose

Some papers cannot be signed electronically by law: deeds, mortgages, promissory notes, powers of attorney, sworn statements, and wills. Galilei Sign knows them and blocks them out of the box, with the referral to a notary or the title company and the option to upload the already-signed copy to the Folder.

We would rather tell you "this one needs a notary" than leave a closing at risk for not warning you.

Katia Valdés Martínez, co-founder

Once signed, the document files itself in the transaction Folder, with download permissions by role. Nobody has to remember to save it, because it never left home. And there is no cost per signed document: envelopes for the whole brokerage go out from the file, on the subscription you already pay.

How signing behaves inside the file is on the signature page, and where every signed document ends up is on documents.

Frequently asked

Is an electronic signature legal in Florida?

Yes. Florida adopted the Uniform Electronic Transaction Act in statute 668.50, which provides that a record or signature may not be denied legal effect or enforceability solely because it is in electronic form, nor a contract because an electronic record was used in its formation. The act applies between parties who have agreed to conduct transactions by electronic means, and that agreement is determined from the context and the parties’ conduct. At the federal level there is also the E-SIGN Act. This is general information, not legal advice.

Does the signer need to create an account?

No. They get a single-use link, open the document, review it and sign from their phone — drawing the signature, typing it in a script face, or reusing the one they already adopted. No sign-up and no password: every extra step between your client and the signature is another day of closing.

What happens if someone alters the PDF after signing?

It shows. The document is sealed cryptographically with a timestamp from an external authority, so any later change invalidates the signature in any reader. Behind it sits the append-only, hash-chained audit log and the audit certificate attached to the document. One point deserves precision, because the industry exaggerates here: our sealing certificate is our own, not purchased from a commercial authority, so Adobe shows an unknown-identity notice rather than a green check. What holds the document up for anyone auditing it is the log and the certificate, not the padlock in the viewer.

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