TrustLynx SignBox
TrustLynx SignBox · e-signing platform
Legally valid e-signing for business documents
Upload a document, invite signers, collect trusted e-ID signatures, and receive a verifiable signed file ready for audit.
For technical & legal teams: SignBox produces ASiC-E / eDoc containers with QES, XAdES-LT and embedded validation data.
Built for HR, legal, procurement, finance, public sector, and enterprise document workflows.
TrustLynx SignBox
Secure electronic signing, end‑to‑end
Step 1 of 5 ·Upload document
PDF
Upload
Workflow
Recipients
Sign
Signed
PDF
Agreement.pdf · 248 KB
Drop a PDF or Word file to begin
PDF
Document SignBox
Sets routing + profile Legal 1
Finance 2
Director 3
Legal
Signer · must sign
Finance
Signer · must sign
Director
Approver · approves
Smart-ID
Enter PIN2 to sign
Signature applied
Original document
Digital signature
Trusted timestamp
Validation · CRL/OCSP
VALID QES · eIDAS
ASiC-E XAdES-LT QES
When to use SignBox. When your organization needs legally valid electronic signing, multiple signers, national e-ID methods, and a final validated container.
Where do you want to start?
Pick the path that matches what you need to do.
I want to understand SignBox
See what SignBox is, the two-portal model and what you need before you start.
View product overviewI need to create a signing process
Upload a document, add recipients and roles, choose a signing mode, then start and track.
Open initiator guideI received a signing invitation
Open the secure link, authenticate with Smart-ID / e-ID and sign - no account required.
Open signer guideI manage templates, profiles & settings
Configure document profiles, attributes, contacts and templates for the whole organization.
Open admin guideHow SignBox works
One document, one workflow - follow it from draft to a sealed, validated signed document.
Example · hiring a new employee
- 1HR uploads the employment agreement.
- 2The new hire gets a secure signing link by email - no account needed.
- 3They confirm their identity and sign on their phone with Smart-ID.
- 4HR sees the status update automatically.
- 5The final signed file is stored and independently verifiable.
Internal & external portals
Initiators build and track processes in the internal portal; signers act externally through a secure handoff - no account required.
Internal Initiates
External Signs
Signer
Applies a legally valid signature.
Approver
Approves the process without signing.
Viewer
Can only view the document.
Parallel or sequential signing
Send to everyone at once, or enforce a strict signing order group by group.
Why organizations use it
The reasons teams standardize on SignBox for organization-wide signing.
End-to-end process control
Follow every process through Draft, Started, Completed and Finished - nothing slips through the cracks.
Trusted signing
Smart-ID, Mobile-ID, eParaksts, ID card and country-specific methods - backed by national identity providers.
Reusable workflows
Save templates, contacts and document profiles so recurring processes start in seconds.
Audit-ready result
An ASiC-E container with QES and XAdES-LT signatures and built-in validation - verifiable long after signing.
Real business workflows
How teams put SignBox to work day to day - from a single-signer contract to multi-party approval.
1 2 3
A signed file you can trust - and prove
Every signature is independently verifiable and tamper-evident, and the file stays valid for years - no special software needed to check it. Here is what is inside.
Smart-ID Mobile-ID eParaksts ID card QES XAdES-LT ASiC-E
Read the documentation
Jump straight to the pages that matter most.
Before you start
Concepts, the two portals and prerequisites.
Initiating a signing process
Upload, add recipients, choose a signing mode.
Signing with Smart-ID
Authenticate and sign on the external portal.
Tracking & status
Follow a process from draft to finished container.
Frequently asked questions
The essentials for evaluating SignBox - including what signing feels like and what you get at the end.
Are SignBox signatures legally valid?
Yes. SignBox produces qualified electronic signatures (QES) in a XAdES-LT, long-term-validatable ASiC-E container - the highest assurance level under eIDAS, with built-in validation.
What does signing look like for the person I invite?
They open the secure link, choose an e-ID method, confirm their identity and sign - usually in under a minute. No account, and nothing to install.
What do I get at the end?
A single signed file: an ASiC-E container holding the original document, every signature, trusted timestamps and validation data. You can download it and verify it independently.
Can the signed file be verified later, outside SignBox?
Yes. The container is a standard eIDAS format any compliant validator can check, with embedded long-term validation data that keeps it verifiable for years.
Which e-ID methods are supported?
Smart-ID, Mobile-ID, eParaksts and national ID cards, with country-specific methods selected by the signer on the external portal.
Do external signers need an account?
No. A signer opens a secure invitation link, authenticates with their e-ID and signs - no SignBox account required.
What is the difference between Completed and Finished?
Completed means every recipient has acted. Finished means the final signed document has been generated and the process is closed - two distinct milestones.
Can I reuse a recurring signing setup?
Yes - save templates, contacts and document profiles so a recurring process starts pre-filled in seconds.
Get started with TrustLynx
Bring legally valid e-signing to your organization
Talk to our team about rolling out SignBox, or explore the developer resources.