Back Arrow Legal Email Delivery Proof

We’re not just securing email and eSigning.

We’ve been helping the British manage their most consequential messages, using the strongest email evidence for proof of who said what when. Legal Proof®.

And we’ve been doing it with them since 2000.

Email Proof of Delivery and Legality in the United Kingdom

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Court Admissible
RSign Used in Business
Relied upon in the United Kingdom since 2000.
The United Kingdom.
Recommended Service
Registered Email™ certified email proof of delivery, RMail® and Digital Seal® services.

Common Use

Registered Email™ services are commonly used within financial services, insurance, legal, human resources, contract management, credit and collections, receivables management, payslip delivery, real estate, and property management industries and functional areas, among other uses.

Watch full video of Karen Fitzgerald discuss RMail at Optimize!2020.

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Having RMail integrated with Acturis works so well for us. It is incredibly useful. Its seamless. It has been a godsend during lockdown.

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Karen Fitzgerald

Karen Fitzgerald

Director, MacKay Corporate Brokers

Legal Aspects

Registered Email™ certified email proof of delivery, RMail® and Digital Seal® services provide electronic seals, electronic timestamping, and legal registered electronic delivery services that are authenticatable proof and court admissible evidence in the United Kingdom.

RMail Registered E-mail™ Services and Evidence within the United Kingdom Legal System. Excerpt from legal analysis by Alan Shipman, Editor, British Standards Institution, BS 10008:2014 Evidential Weight and Legal Admissibility. (Full analysis is available from RPost).

RPost® service delivers a Registered E-mail™ message to the recipient and returns verifiable evidence of the precise content (message body and all attachments) and official time the e- mail was sent and received by each recipient. The service accomplishes this without storing e-mail messages and without any extra recipient action or special settings or software on the recipient side.

This review of the admissibility and evidential weight of RPost’s Registered E-mail™ service in the United Kingdom presents the following conclusions:

  1. DELIVERY PROOF: RPost’s Registered E-mail™ service provides a record of sending and receiving in accordance with the European Electronic Commerce Directive (2000/31/EC) by recording the recipient’s server’s receipt thereof;
  2. CONTENT PROOF: The encryption and tamper-detectability of RPost’s Registered E- mail™ service preserves the contents of e-mails and their attachments so as to satisfy process requirements designed under the European Electronic Commerce Directive (2000/31/EC) and eIDAS evidence law and to establish evidence of content;
  3. OFFICIAL TIME STAMP: RPost’s link to a trusted and objective time source provides essential and credible evidence in disputes in which the time an e-mail was sent or received is material to the case;
  4. ADMISSIBLE EVIDENCE: RPost’s Registered E-mail™ service receipts are admissible as to their fact of delivery, as to their trusted time of delivery and as to the authenticity of their content;
  5. FUNCTIONAL EQUIVALENCE: RPost’s Registered E-mail™ service, under European Electronic Commerce Directive (2000/31/EC) and eIDAS, can serve as the functional equivalent of paper mail, to be used in lieu of certified mail, registered mail, return receipt mail, private express mail services, fax logs and similar types of paper mail services;
  6. ELECTRONIC ORIGINAL: RPost’s Authentication Receipt™ provides a methodology for demonstrating the trustworthiness of the electronic original, including the message content, attachments and transmission meta-data including the delivery audit trail;
  7. SELF-AUTHENTICATING EVIDENCE: The RPost system provides the ability to have e-mail evidence authenticated without relying on complexities of a system-wide authentication or


Within the UK, the majority of instances where the contents of an e-mail will be used as evidence are those dealing with civil litigation. The appropriate legal system for civil litigation is defined by the Civil Evidence Act 1995. The appropriate sections (8 and 9) of the Act related to the admissibility of documentary evidence are as follows:

  1. (1) Where a statement contained in a document is admissible as evidence in civil proceedings, it may be proved: (a) by the production of that document, or (b) whether or not that document is still in existence, by the production of a copy of that document or of the material part of it, authenticated in such a manner as the court may approve. (2) It is immaterial for this purpose how many removes there are between a copy and the original.
  2. (1) A document that is shown to form part of the records of a business or public authority may be received in evidence in civil proceedings without further proof. (2) A document should be taken to form part of the records of a business or public authority if there is produced to a court a certificate to that effect signed by an officer of the business or authority to which the records belong. (Reference – Civil Evidence Act 1995). Therefore, any ‘statement contained in a document’ – and this will include statements in e- mails – is hereby shown to be admissible as evidence into a UK civil court. There are no specific requirements included in the Civil Evidence Act that need to be met to address issues of legal admissibility. In practice, the only challenge to legal admissibility will come from the judge during the hearing of a particular case. Therefore, one should focus on “authentication” of the e-mail that is to be used as evidence in civil litigation, in light of how a judge might need to accept such authentication. The party with the most evidential weight often has the upper hand and it is here that the strength of RPost’s “legal” proof capability is likely to prevail.


Once legal admissibility is determined (e.g. can statements within an e-mail be admitted into court as evidence), the evidential weight of the information contained within the document must then be scrutinized. Such scrutiny will relate to the authenticity, integrity and availability of information processed in an electronic format. It is thus critical that the court be satisfied that such electronic information is both reliable and accurate.

The ability to be able to prove the integrity of content of an e-mail (including any attachments) and its time of delivery are becoming increasingly important. There are common misconceptions around standard e-mail systems which can easily be exploited by one party or another to deny or dispute the integrity of an e-mail. Some common misconceptions follow:

  1. READ RECEIPT: Many MS Outlook users believe they already have delivery proof capability within e-mail system. The tracking options require the recipient of an e-mail to confirm receipt. Typically, such requests are ignored. Further, it is relatively easy to forge a read receipt. Where a receipt is received, it does not include any confirmation of the content of the e-mail.
  2. SENT FOLDER / ARCHIVE: Many users believe that their “sent items” folder or “archive” provide a record of their correspondence. Whilst it can provide a record of what they claim to have sent, it does not protect them from a recipient claiming they did not get the e-mail, nor that the e-mail contained different information or attachments when they received it.
  3. PRINTED E-MAIL RECORDS: Many organisations believe that a printed e-mail (from the inbox, sent folder, or other folder) is an effective way to authenticate the contents of an e-mail. However, if the contents of an e-mail are questioned, the e-mail may be withheld from evidence unless the holder of the printed e-mail can authenticate that correspondence via another means.
  4. BOUNCE NOTICE: Many users believe that if they do not receive a “bounce” notice, then that e-mail was delivered to the recipient. As many e-mail systems turn off these “bounce” notices due to spam and blacklisting concerns, such a belief may be ill-founded.

Within the UK, the British Standards Institution (BSI) ‘Legal Admissibility’ British Standard (BS 10008:2014) is where one turns for assistance in demonstrating the authenticity of information in an electronic form. For e-mail applications, additional guidance is available in the BSI Code of Practice BIP 0008-2:2014, Annex A.


BS 10008:2014 and the aligned Code of Practice (BIP 0008-2:2014, Annex A) discusses the advantages of e-mail systems that include a proof-of-delivery option. The Code of Practice notes that “whilst the receipt of such a confirmation message may be trustworthy, the absence of such a receipt may not be reliable evidence as to either delivery or non-delivery”.

It is important to note that the RPost “proof of delivery” capability speaks directly to this provision. Every Registered E-mail message generates an automatically returned Registered Receipt™ e-mail that contains the contents of the original e-mail and any attachments, held in an encrypted form incorporated into the receipt (note, RPost does not store a copy of the e- mail or receipt, or encrypted data associated with the e-mail or receipt). The encryption key can only be deciphered by RPost, thus securing the contents of the receipt. The receipt also confirms the delivery status and official time stamp of both sending and receiving of the original e-mail message. The Registered Receipt™ e-mail is a digital snapshot of the server-to- server conversation that surrounds the sending and receiving (or possible non-receipt) of the e-mail and itself can be used to regenerate an authenticated original e-mail (and all attachments) should a subsequent challenge arise. The delivery status will reflect a minimum of “delivery to mail-server” (or “delivery failure”) but could show “delivery to mailbox” and “opened” wherever possible. It should be noted that an absence of a receipt, or an absence of a “date and time of opening” entry does not prove that the e-mail was never received / opened.


To further enhance the potential evidential weight of an e-mail, the RPost system provides a mechanism for demonstrating the authenticity of a stored e-mail. This authentication can take place any time after the Registered Receipt e-mail has been received by the sender – the original message can be re-authenticated at any time. Thus, even where the content of a stored e-mail has been changed (either inadvertently or maliciously), the e-mail can be independently authenticated by forwarding the Registered Receipt e-mail to RPost where it is unlocked and used for verification purposes. Where doubt occurs with an authenticated e- mail, a re-authentication could be performed ‘in front of the court’ if necessary to provide the strongest test possible of the validity of the evidence contained within the e-mail under question.

Laws Referenced

United Kingdom Electronic Communications Act of 2000, Part II “Facilitation of Electronic Commerce, Data Storage, Etc.” defines what would be considered an electronic signature that would have standing in a legal proceeding; the Civil Evidence Act 1995, the British Standards Institute ‘Legal admissibility’ Code of Practice – BIP 000, and European Union laws on the enforceability of electronic transactions is governed by the Electronic Signatures Directive adopted in 1999 and the Electronic Commerce Directive adopted in 2000; and in 2016, European Union Regulation No 910/2014 (eIDAS).

Disclaimer: Neither RPost nor its affiliates provide legal opinions. The information on RPost and its affiliates and products websites is for general information purposes only and is not intended to serve as legal advice or to provide any legal opinions. Laws and regulations change from time to time and neither RPost nor its affiliates guarantee that all of the information on RPost and its affiliates’ websites are current, correct, or with sufficient detail for the purpose of each reader. You should consult your legal counsel for specific jurisdictional details and other issues.

Tradenames are owned by the named company. Service benefit is summary, not intended to be a case study.​ RPost technology is patented. RMail, RSign, and RPost are trademarks owned by RPost.