For construction and engineering

Sign contracts and tenders with people you've verified

Send contracts, change orders and tender documents to verified people, share drawings in one place, and sign with a qualified electronic signature that holds in every EU country.

Try Trust CircleSee pricing

Identity verification is included in every plan, with no fee per check.

HBHarbour bridge, phase 2Nordvik Bygg AB5 verified members
SubcontractSigned with QES by 3 of 3Signed
Change order 14Waiting for 1 signatureWaiting
Drawings rev CShared with 5 verified membersShared
MembersSite manager, client, 2 subcontractors, engineerVerified

Download the signed set

Sound familiar?

Who signed? Which revision? Which subcontractor?

INBOX

Subcontract_final_v3_SIGNED.pdf

From the subcontractor

You can't tell who signed.

A scanned signature on a PDF doesn't prove the person behind it.

Every signer is identity-verified, and the signature is qualified under eIDAS.

INBOX

Re: Re: drawings rev C

Link expired

Drawings live in inboxes.

Old revisions stay in email threads and on laptops, and you can't show who got the new one.

One Trust Circle per project, where only verified members see the files.

TENDER PORTAL

Deadline 12:00, signature missing

Bid not submitted

Some buyers ask for a stronger signature.

Public buyers can require an advanced or qualified signature on bids, for example in Germany (VgV §53(3)) and at the Dutch Rijkswaterstaat.

Sign with a QES from your phone, minutes before the deadline.

The rules

When a scanned signature isn't enough

Directive 2014/24/EU

Public tenders

Buyers may require an advanced or qualified signature. When they do, they must accept one backed by a qualified certificate (Article 22(6)).

BGB §650h

Ending a contract in writing

In Germany, terminating a construction contract needs written form. A court rejected a scanned signature sent by email (OLG München, 2022). A QES meets written form (BGB §126a).

eIDAS Article 25(2)

Equal to handwritten

A qualified electronic signature has the legal effect of a handwritten one in every EU country.

How it works on a project

One project, every party verified

  1. 01

    Create a Trust Circle for the project

    Invite the client, subcontractors and consultants.

  2. 02

    Each person verifies once

    ID document scan and liveness check on their phone. About 3 minutes, valid for 2 years, across projects.

  3. 03

    Share the documents

    Drawings, specs and contracts go to verified members only.

  4. 04

    Everyone signs with a QES

    In the ZealiD app, or inside DocuSign or Adobe Acrobat Sign.

Document sharing

Documents per project, not per inbox

Each project gets a Trust Circle. Everyone in it is verified, so you know who opened and downloaded each file.

Secure document sharing →

Harbour bridge, phase 25 verified
Drawings rev C.pdfShared by you · 4 Nov
Change order 14.pdfWaiting for 1 signature
Subcontract Halden.pdfSigned with QES · 28 Oct

Change order 14.pdf

Scan with the ZealiD app to sign

Qualified electronic signature · qualified timestamp

Qualified signature

Signatures that hold across borders

Foreign subcontractors and clients sign with the same qualified signature. The ZealiD app accepts 265+ ID documents from 50+ nationalities.

Qualified signature →

Legal and public submissions · DLA Piper

Read the case study →

€20 saved per signature

Qualified signatures for commercial agreements and public submissions, inside DocuSign.

Pricing

Plans for project teams

For teams up to 10

Professional

€119.20 a month, billed yearly

  • Up to 10 users
  • 75 QES a month
  • KYC add-on available, €100 a month
Try Trust Circle

Starter

€39.20 a month, billed yearly

  • Up to 3 users
  • 15 QES a month
  • DocuSign, Adobe and Microsoft integrations
Choose Starter

Identity verification is included in every plan, with no fee per check. See all plans →

For your IT and security review

Answers your security team will ask for

  • ZealiD AB is a Qualified Trust Service Provider on the EU Trusted List (Sweden)
  • Supervised by the Swedish Post and Telecom Authority (PTS)
  • Audited every year by TÜViT, an accredited eIDAS conformity assessment body
  • Documents stored in Stockholm, EU
Send to your IT team

ZealiD AB

QUALIFIED TRUST SERVICE PROVIDER

StatusEU Trusted List
SupervisorPTS, Sweden
Yearly auditsTÜViT
Document storageStockholm, EU
Check ZealiD on the EU Trusted List →

Sign your next contract with verified people

Share the drawings and sign the contract in one place.

Try Trust CircleSee pricing

FAQ

Questions from construction and engineering firms

Is a qualified electronic signature legally binding?

Yes. It has the same legal effect as a handwritten signature in every EU country (eIDAS Article 25(2)).

Can foreign subcontractors sign?

Yes. The ZealiD app accepts 265+ ID documents from 50+ nationalities.

Do our clients and subcontractors pay anything?

No. Identity verification is included in your plan, and the person verifying doesn't pay.

Can we keep using DocuSign or Adobe Acrobat Sign?

Yes. ZealiD's qualified signature works inside both.

Is a QES accepted for public tenders?

Where a buyer asks for an advanced signature, EU law says it must accept one backed by a qualified certificate, and a QES is the highest level. Many tender platforms only need a login or a simple signature, so check each platform's rules before the deadline.

How long is a verification valid?

2 years.

More questions? See all answers on ZealiD Answers →