Free notarisation

Quadrans Foundation provides a free notarisation tool. This can timestamp a document, prove its integrity and ownership of the document at the time the timestamp occurred.

Subscribe to our tool for free, then follow simple steps outlined in the how-to. Please make sure you read and fully understand the FAQ and the disclaimer of this tool.

The service provided by Quadrans Foundation issues unique digital timestamping of documents upon request from users.
Any legal repercussion varies according to the legislation of the Country in which this tool is used.
Unless recognised by the statutory law of the Country in which this tool is used and a clear reference to the legislation is made, the service provided by Quadrans Foundation does not override the legal authority of a government official or a qualified person who is legally appointed to provide services recognised by the State.

The objective is ambitious:

we want to build a global, open, inclusive, public, decentralised and autonomous infrastructure.

Register to use the notarisation


* indicates required


Notarisation guide:

it couldn't be simpler!

Chose the document/file you want to notarize. If you want to notarize multiple files at once collect all the data into an archive (like a .zip or .tar file). Then, using a hash calculator, get the SHA256 digest of the file or archive.
The rest of the process is done via email: send an email to following the simple instructions below:




Subject: must contain the word "notarize" (case insensitive) and information about your documents (optional)


Body: must contain a valid SHA256

Go to our section "tools" for a valid hash calculator

You will receive a response

on your mail within minutes

It might either say that your request has been queued or, in case an error occurs, that your request has been rejected. Depending on the amount of requests we receive it might take up to 24 hours. Please be patient, do not send the same request twice while waiting for the completion of the first request.

The response email will contain a short description and will carry a PDF file as attachment. Print or save the PDF file and store it together with the original document/data in a safe place. Those two elements are required to prove the integrity of the notarisation. In the PDF file you will find a QRCode that points to a courtesy page on Quadrans website. This page contains the same information of the PDF file structured in a step-by-step procedure allowing an independent verification of all data.

Please take your time to get familiar with the procedure and test out all the steps involved.


notarisation's disclaimer

Please consult the laws of your country concerning notarisation and blockchain. Remember that notarising a document or packet of data does not mean that it's content or it's meaning is true. Also notarising a document does not imply that you are the rightful owner of the document, but that you had a copy of it at the time it was notarised.

This is a free service and is provided "as-is". In no event Quadrans Foundation or the contributors are liable for any direct, indirect, incidental, special, exemplary, or consequential damages (included but not limited to procurement of substitute goods or services, loss of use, data or profits, or business interruption) however caused and in any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of the use of this service, even if advised of the possibility of such damage. No assumptions can be made about this service, included but not limited to for it's reliability or fitness for any particular purpose

Useful links


The only programs you need for the notarisation process are an email client and a hash calculator tool to compute the SHA256 hash of the file you want to notarize. Several free tools are available for the different Operating Systems.

Or just use the sha256sum command in a shell:

$ sha256sum <filename>

Frequently Asked Questions


Here is a list of some frequenty asked questions. If you have a doubt you will probably find and answer hereunder. Should this not be the case, please send us an email and we'll reply to you and update the FAQ list.

Can I just send the file instaed of it's hash?

No, you don’t want that… The main reason for this is your security. Sending importand documents, intellectual property or sensitive data, via Internet is never a good idea. Anything can happen along the way and result in (as an example, but not limited to) personal data breach such as stealing your data and/or notarize it using third parties’ name or having the service denied. Be wary, only send hashes to any notarisation service provider. Also, this unnecessarily make the service more complex. For example there could be a limit in the size of data the service can handle, or people handling the data (directly or indirectly) need to be authorised to properly handle data.