Paid after you deliver
You send the final file and hope the invoice gets paid. Your leverage is gone the moment it lands.
Digital Delivery Assurance
Deliver high-value work — and prove it.
Euploia is the closing room for digital delivery. Lock your file, let the buyer review a watermarked preview, take payment, and release the final — with a tamper-evident certificate for both sides.
SHA-256 sealedStripe paymentsProof certificateFull audit trail
$12,500 paid
Proof of Delivery
Certificate of Delivery
Q3 Brand System · Final Delivery
DDA-2026-000412
LockedReviewedAcceptedPaidReleased
Artifact hash · SHA-256
9f2a c41e 77b0 3d8e 1a64 bb29 e057 4f12
The problem
Handing over finished work shouldn't be an act of faith.
Delivered before it's seen
Buyers pay without confirming the final matches the brief — or pay late because they can't preview it safely.
No shared record
When something's disputed, neither side has proof of what changed hands, in what version, and when.
How it works
Five steps. One clean handoff.
Every project moves through the same chain of custody — and every step is recorded.
01
Lock
Upload the deliverable. We hash it (SHA-256) and lock the version so it can't change.
02
Review
The buyer is invited to review a watermarked preview — no full file until it's paid.
03
Accept
Buyer accepts, requests changes, or rejects with a reason — all on the record.
04
Pay
Payment is confirmed via Stripe. Euploia records the event — it never holds the funds.
05
Release
The final file unlocks and both parties get a proof-of-delivery certificate.
Use cases
Built for high-value digital work.
Design studios
Brand systems, design files, and source assets — released only when the work is paid.
Consultants
Reports, models, and research deliverables handed over with a clear record of what was sent.
Agencies
Final campaign assets delivered to clients with milestone proof and a clean paper trail.
Software & data
Builds, datasets, and exports released against payment, with a hash to prove integrity.
For sellers
Get paid on release, not on trust
The final file unlocks the moment payment is confirmed — never before.
Tamper-evident proof
Every version is hashed and locked, so there's no argument over what you delivered.
A professional close
Replace the awkward “did you get my invoice?” with a clean, certified handoff.
For buyers
Review before you pay
See a watermarked preview and confirm the work matches the brief — risk-free.
Request changes on the record
Accept, reject, or ask for a revision — every decision is logged for both sides.
Certificate of what you received
A permanent record of the file, its hash, and the full delivery timeline.
The certificate
Every delivery ends with proof.
When a file is released, Euploia issues a proof-of-delivery certificate to both parties — a permanent record of exactly what changed hands.
Certificate ID, project, and both identities
Artifact name, version, and SHA-256 hash
Full timeline: upload → lock → accept → pay → release
Payment reference and audit reference
Proof of Delivery
Certificate of Delivery
Cert ID
DDA-2026-000001
Seller
Mara Reyes · Polar Studio
Buyer
Daniel Okafor · Northwind
Artifact hash · SHA-256
9f2a c41e 77b0 3d8e 1a64 bb29 e057 4f12 8c6d aa31 2e90 7b15
This certificate records platform activity and digital delivery events. It does not determine legal ownership or dispute outcome.
Pricing
Straightforward, usage-based.
No subscription. You only pay when a delivery is released and paid.
Now in beta
Free
while we're in beta
Unlimited projects
Hashing, preview & certificates
Stripe payments
At launch
1% per released delivery
placeholder — final pricing TBD
Everything in beta, forever
Priority support
No monthly fee
Close your next delivery
with confidence.
Lock the file, take payment, release with proof. Set up your first project in minutes.
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