Poor man's copyright, a legal false friend
Mailing yourself your manuscript or your demo and keeping the envelope sealed, the technique is famous. It is also widely overestimated. Here is what it is really worth in court, and what to replace it with.
Why this myth is so widespread
The logic seems airtight, the postmark proves the date, the sealed envelope proves the content. The process costs the price of a registered letter, about €7, and has been practiced for decades by authors and musicians.
The problem is that half of the reasoning is wrong. The postmark does prove an envelope was mailed on a given date. It proves nothing about what is inside.
The 3 flaws in court
Content integrity is not guaranteed
An envelope can be steamed open and resealed, or mailed empty and filled later. Nothing technically binds the content to the postmark date. This is the central argument of opposing counsel.
The proof is fragile and single-use
The envelope can only be opened once, before a judge or a bailiff. If it is lost, damaged or opened by mistake, the proof is gone for good.
Courts regularly dismiss it
Case law treats this process as mere prima facie evidence, contestable and rarely sufficient on its own. No statute gives it specific evidential value, unlike official deposit systems or qualified timestamping.
Reliable alternatives
For the same budget, or less, systems designed for proof of prior existence exist.
| Solution | Cost | Content integrity | Reusable proof |
|---|---|---|---|
| Registered letter to yourself | ~€7 | Not guaranteed (envelope can be opened) | No, single use |
| Copyright01 | €0 (3 deposits), then from €4.90 | SHA-256 fingerprint, any modification is detectable | Yes, publicly verifiable certificate, unlimited checks |
| e-Soleau (French INPI) | €15 (10 MB max) | Guaranteed by the INPI | Yes, for 5 to 10 years |
| Bailiff report | €200 to €500 | Guaranteed by a ministerial officer | Yes |
What a digital deposit changes
An online deposit computes the SHA-256 fingerprint of your file, a unique cryptographic signature. Changing a single byte of the file changes the entire fingerprint. Timestamping binds this fingerprint to a certain date, and the certificate can be publicly verified by anyone, as many times as needed.
Where the registered letter relies on a fragile, contestable physical envelope, the digital deposit relies on verifiable mathematics. And it costs less than a registered letter.
Frequently asked questions
Does poor man's copyright have any legal value?
A weak one. It may constitute prima facie evidence of a date, but content integrity is contestable and courts regularly dismiss it as sufficient proof of prior existence.
I already have sealed registered envelopes, what should I do?
Keep them sealed, they keep their value as prima facie evidence. In addition, re-register your works with a timestamped digital deposit, free for the first 3 on Copyright01.
What about emailing myself?
Even weaker. Email headers can be forged and the timestamp depends on non-certified servers. No guarantee of content integrity.
What is the cheapest alternative?
The free deposit on Copyright01, 3 deposits offered with SHA-256 fingerprint, timestamp and verifiable certificate. Cheaper than a registered letter stamp.
Replace the envelope with verifiable proof
3 free deposits, instant certificate, cheaper than a registered letter.
Deposit for free