Certified field activities: digital proof of execution and on-site presence

Certification of photos, videos and reports collected in the field with digital signature, GPS and timestamping to prove the actual execution of work on-site.

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Companies managing distributed field operations (maintenance, installation, facility management, technical services, logistics) need to document the actual execution of activities to comply with service contracts, SLAs and regulatory obligations.

Technicians, operators and maintenance workers produce photos, videos and work reports during interventions, but without guarantees of integrity, certified timestamp and verified geolocation, this evidence can be challenged by clients and is inadmissible in disputes. The burden of proof lies with whoever claims to have performed the service, while eIDAS, ISO/IEC 27037 and the ESIGN Act require verifiable documentation for public and private contracts. TrueScreen certifies every piece of evidence collected during field activities with digital signature, timestamp and GPS coordinates, producing proof with full legal value.

Industry

Technical services, facility management, maintenance, installation, field service

Business function

Operations management, field service management, contract management, quality control, legal department

Key process

Work execution verification, operator check-in and check-out, activity documentation, SLA monitoring, contractual reporting

Certified content

Photos, videos, operational checklists, work reports, technical documentation, GPS data and timestamps

Output

Legally valid certified documentation and reporting

Adoption mode

App / Web / API / SDK

Needs

  • Photo and video evidence of field work without certified timestamps or authenticity guarantees

  • Inability to prove the operator’s presence at the declared location and time

  • Contractual obligations and SLAs requiring verifiable proof of service execution

  • Client disputes over intervention quality without legally enforceable evidence

  • Excessive time to consolidate work reports and field data into structured client reports

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The TrueScreen solution

TrueScreen enables technicians and field operators to certify every piece of evidence collected during interventions directly from the work site. Photos of initial and final conditions, work videos, completed checklists and reports are sealed with a digital signature, eIDAS-compliant timestamp and GPS coordinates.

The system automatically records the operator’s presence at the location and time of the intervention, building a certified dossier with immutable metadata and documented chain of custody. Certified evidence demonstrates the actual execution of the service and is enforceable in any contractual or legal proceeding.

What gets certified

Site and equipment conditions

Photos and videos of conditions before, during and after the intervention with certified timestamp and geolocation.

Operator presence and activity

Certified documentation of check-in and check-out with timestamp, GPS and operator identity.

Operational checklists and work reports

Compliance checklists completed on-site with digital signature and timestamp.

Intervention reports

Technical work reports with attached photographic documentation, certified metadata and chain of custody.

Expected benefits

  • Certified proof of actual work execution enforceable in any legal or contractual venue

  • Certified check-in and check-out with GPS and timestamp proving on-site presence

  • Documented compliance with contractual obligations, SLAs and applicable regulations

  • Reduced reporting time with structured reports ready for the client

  • Objective performance and SLA monitoring with certified and indisputable data

Partners

Facility management companies, technical services and maintenance firms, installation and assembly businesses, logistics operators, field service management companies, and law firms specializing in contract and procurement law can integrate TrueScreen into their operational workflows.

Integrations

TrueScreen integrates with field service management (FSM) systems, CMMS platforms, workforce management software, ERP and contract management systems. Certified reports are exportable in PDF and JSON format, compatible with major ticketing, billing and reporting systems.

FAQ: certified field activities and digital proof of execution

1) How does the certification of evidence collected during field activities work?
Technicians and field operators capture photos, videos, checklists and work reports directly on-site through the TrueScreen app or field service management systems integrated via API/SDK. Each piece of content is automatically certified at the time of capture with immutable metadata: date, time, GPS position, operator identity and cryptographic hash, with a digital signature that guarantees full evidentiary value.
2) How is the operator's presence at the location and time of the intervention proven?
TrueScreen automatically records GPS coordinates and a certified timestamp at the time each piece of evidence is captured. The operator's check-in and check-out are documented with geographic position, time and verified identity, creating certified proof of on-site presence that cannot be altered or backdated.
3) Are certified evidence files valid as proof in contractual disputes?
Yes. The digital signature compliant with the eIDAS Regulation and ISO/IEC 27037, together with the certified timestamp, grants full legal value to certified evidence. The documentation is enforceable in court, in contractual disputes, SLA compliance audits and any proceedings where it is necessary to demonstrate the actual execution of the service, in accordance with the Federal Rules of Evidence and the ESIGN Act.
4) Does TrueScreen help meet contractual obligations and SLAs with clients?
Yes. Every intervention is documented with certified evidence that includes timestamp, GPS and operator identity. Structured reports and certified dossiers allow precise tracking of completed activities, demonstrating compliance with timelines and methods set out in service contracts and SLAs, and providing clients with verifiable and indisputable documentation.
5) Can TrueScreen's GPS certification be falsified or manipulated?
No. TrueScreen uses proprietary acquisition technologies that prevent the manipulation of GPS data and timestamps. Geographic coordinates and time are recorded at the moment of capture and sealed with a digital signature and cryptographic hash. Any subsequent tampering attempt invalidates the certification, ensuring the reliability of on-site presence proof.
6) How does TrueScreen integrate with existing field service management systems?
TrueScreen integrates via API and SDK with field service management (FSM) platforms, CMMS systems, workforce management software, ERP and contract management systems. Certified reports are exportable in PDF and JSON format, compatible with major ticketing, billing and reporting systems already in use. Integration requires no changes to existing operational workflows.

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