THE SOVEREIGN BRIDGE FOR MARITIME TRADE
Global standards meet sovereign law.
Digital trade platforms solved interoperability — then stopped at the border, where documents lose legal weight and get printed. Maresign is built to close that gap, giving maritime documents binding legal force inside strict national jurisdictions. Built by Master Mariners. In authorized partnership with ArkSigner. Stop trading copies. Start trading cryptographic reality. Maresign provides the Exclusive Control Infrastructure required to turn globally interoperable data into legally binding statutory assets. By deploying state-backed cryptography, we deliver Sovereign Legal Trust to the last legal mile of global supply chains.
Paper still wins at the border.
A document is only as good as the jurisdiction that recognises it. When a digital trade document crosses into a strict national jurisdiction that hasn’t adopted MLETR, it loses local legal weight — and gets reprinted. The global trade-finance gap sits near $2.5 trillion, hitting hardest exactly where the global platforms can’t reach. That gap isn’t a software bug. It’s a sovereignty bug. It’s the one we exist to close.
< 0.3%
of bills of lading are electronic
≈ $2.5T
global trade-finance gap ADB, 2025 Survey
Bridging Global Standards with Local Legal Recognition
Exclusive Control (MLETR Art. 11 / UK ETDA 2023 s.3)
Our vault-ledger architecture is engineered to enforce exclusive control and singularity of the electronic record — the reliability standard that P&I clubs, banks, and courts actually test against. One record, one holder, one chain of endorsement.
Sovereign Compliance (MLETR Arts. 10–12)
We design DCSA-standard eBL data payloads to operate as instruments recognized under national law. Today, that recognition runs on a contractual rulebook binding every participant; it is engineered to become a statutory reference implementation as MLETR-aligned legislation is enacted in Türkiye and across the region.
Cryptographic Execution (QES, Law No. 5070 / eIDAS-aligned)
Through our authorized channel partnership with ArkSigner, a government-accredited Certificate Authority, we bring qualified electronic signatures — legally equivalent to wet-ink signature under Turkish law — and biometric identity verification directly into maritime workflows.
AVAILABLE NOW
Digital Seaworthiness — what you can use today.
Qualified electronic signatures, biometric identity verification, corporate e-seals, and document verification — built for maritime documents and the way the fleet actually works. Sign survey reports, certificates, crew and operational documents with state-recognised legal force. Prove their integrity to a Port State Control officer, an insurer, or a casualty investigator in seconds. Not just a document — evidence.
Maresign QES
Qualified e-signature (QES) for maritime documents.
Maresign ID
Biometric KYC / remote identity verification. No anonymous users.
Maresign Verify
Verify any signed document’s integrity, instantly.
Maresign Seal
Corporate e-seal for entity-level issuance.
Maresign Cert
Certificate lifecycle management.
Available now through our ArkSigner integration. No minimum users, no long-term contract. Pay-as-you-go for small operators; volume pricing for fleets.
IN BUILD
The sovereign eBL — what we’re building.
An electronic bill of lading that holds its legal weight where global platforms lose theirs. Exclusive control and singularity — one valid title at a time, enforced cryptographically. A closed-loop rulebook every party signs on entry. A switch-to-paper “burn” so a digital twin and a paper original can never exist at once. Designed to meet the IG P&I “deemed approved” criteria under the singularity standard of the UK ETDA 2023 — and to become the reference build for MLETR reform in the jurisdictions that adopt it.
Who we serve.
Shipowners & managers
Pain — high OPEX, detention risk, paper-heavy clearance.
Value — state-recognised digital sign-off; operational speed; verifiable “digital seaworthiness.”
Superyacht operators & charter brokers
Pain — cross-jurisdiction signing chaos — owner in Monaco, vessel in Cayman, signatory in Türkiye.
Value — real-time qualified signing, with navigational guidance on which law governs.
Port agents, authorities & customs
Pain — slow clearance, forged registries, shadow-fleet actors.
Value — instant verification; accelerated single-window.
Banks & trade financiers
Pain — the $2.5T trade-finance gap; manual document checks.
Value — an eBL with sovereign legal weight that automates compliance and frees working capital. (Destination.)
The trust architecture.
Technical firepower
ArkSigner PKI: BTK-licensed CA, qualified e-signatures, e-seals, PAdES LTV archival timestamps. Conforms to ETSI CAdES / XAdES / PAdES.
Legal anchors
Aligned with IMO FAL.5/Circ.39 & Circ.46, the UK ETDA 2023 singularity standard, and MLETR Arts. 10–12.
Domain expertise
20 years of seafaring, flag-state survey, and superyacht management, translated into a frictionless, mariner-built workflow.
Maresign doesn’t just sell software. It provides a cryptographically secure, legally grounded chain of custody.
eIDAS NOTE
Türkiye is not in the EU, so automatic cross-border recognition under eIDAS isn’t guaranteed as a matter of law. Maresign conforms to the same ETSI standards (CAdES/XAdES/PAdES) that underpin eIDAS systems, and EU counterparties routinely accept them operationally. For transactions where legal certainty is paramount, we recommend a case-by-case review.
FOUNDER
Built by someone who’s stood the watch.
Maresign was founded by a Master Mariner — 20 years at sea, a flag-state surveyor, and a general manager in superyacht management and flag registration. Maresign exists because the people building digital trade infrastructure rarely stood a watch, and the people who stood the watch rarely build software. We do both. That’s why our tools fit the way the fleet actually works — and why our legal architecture answers to the realities of a casualty investigation, a Port State Control inspection, and a strict national customs desk, not just a slide deck.
Because a port wouldn’t accept it. Because the bank wanted wet ink. Because the jurisdiction didn’t recognise it. That’s the gap we close.
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