Industries

Construction

Accelerate project execution with fast and secure digital signatures. Eliminate bureaucracy in contracts with suppliers, clients, and subcontractors, reduce operational costs, and gain more agility at every stage of your project – from proposal to key handover.

Building construction site with multiple cranes

The documents of everyday site work

From signing the construction contract to handing over the keys: what builders, developers and contractors send for signature most.

Construction contracts

Scope, price and schedule settled between owner and builder before mobilization. It is the contract referenced by the ART, Brazil's technical responsibility filing.

Contract amendments

Extended deadline, wider scope or rebalanced price? The amendment circulates through the same parties as the original, without turning into a site argument.

Progress measurement reports

The work executed in the period becomes a report signed by engineer and inspector. It is the documentation that backs the installment at invoicing time.

Key handover terms

Inspection approved, property accepted: the buyer signs the receipt term and the builder keeps a record of when the keys changed hands.

Subcontractor agreements

Formalizes scope, deadline and responsibility for each outsourced front, and the subcontractor signs through the link before mobilizing the crew.

Safety briefings and terms

The record that the crew received the daily safety briefing and the guidance of Brazil's NR-18 site-safety rules, signed by each worker right on site.

Equipment rental agreements

Crane, scaffolding, concrete mixer: the contract with the rental company sets deadlines, amounts and who answers for the equipment while it is on the job site.

Material supply agreements

The price and schedule agreed with the concrete, steel or window supplier become a signed contract, and the first truck arrives with everything documented.

A monthly measurement, from template to certificate

The path of the site's most recurrent document inside Signater, in three steps.

  1. The report comes out of the template

    The period's measurement closes and the report is generated from the project's model: you fill in executed items, quantities and amounts on a single-screen form.

  2. Engineer and inspector sign on site

    Each receives their own link by email, SMS or WhatsApp and signs in the phone's browser, right there on the job site, without installing an app.

  3. The trail records where and when

    Each signature enters the audit trail with date, time, IP and geolocation, and the certificate of completion consolidates the full history to back the installment payment.

Identity proven far from the office

Factors configured per signer, made for documents born on the job site. Every recorded validation becomes evidence in the envelope's certificate of completion.

Geolocation

The signer's IP is resolved into city, region and country and, when the browser allows it, coordinates come in too, with reverse geocoding. It is the evidence of where each signature happened.

Selfie with liveness detection

The browser camera captures the selfie with active liveness detection, with gestures like blinking and smiling verified on the device itself. The photo enters the certificate of completion as visual evidence of the act.

In-person signing

Generate the link on your own device and collect the signature on the spot: useful when the foreman or the supplier is next to you on site and the document cannot wait.

The nine available factors are on the Identity validation page.

See the features up close

What sustains this flow, feature by feature: each card leads to the full page, with how it works in detail.

Frequently asked questions

Can people sign on site without installing an app?

Yes. The signer opens the link received by email, SMS or WhatsApp and signs right in the phone's browser: the responsive interface requires no installation. When the person is next to you on the job site, you can also generate the link on your own device and collect the signature on the spot.

How do I prove where and when a document was signed?

Every signer action enters the audit trail with date, time, IP and device. With the geolocation factor, the IP is resolved into city, region and country and, when the browser allows it, coordinates come in with reverse geocoding. At the end, the certificate of completion consolidates all this evidence in one place.

The amendment involves the same parties as the original contract. Do I have to set everything up again?

No. An envelope gathers several documents and several signers into a single flow: you assemble the amendment with the same parties, set each one's validations and send once. Envelopes hold up to 20 documents and 20 signers on Starter, 50 on Business and no limit on Enterprise.

The measurement report changes every month. Do I need to build the document from scratch each time?

No. Turn the report into a template: the fixed wording stays ready and typed fields mark what varies, such as period, executed items and measured amounts. When issuing, you fill out a single-screen form and the document is generated on the spot, ready to move on in an envelope.

Is an electronically signed construction contract legally valid?

Yes. Electronic signature laws such as the U.S. ESIGN Act and the EU's eIDAS regulation recognize electronic signatures; in Brazil, contracts between private parties can be signed electronically under MP 2,200-2/2001. Signater produces an advanced electronic signature based on a digital certificate, in the PAdES standard. In a dispute over the project, the certificate of completion gathers the evidence of who signed, when, from where and with which validations.

People in front of a laptop reviewing its screen

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