Registered Letter & Acknowledgement of Receipt

Processes, costs and digital alternatives for B2B

How can you clearly prove that an important document – such as a termination notice, reminder, or formal objection – has actually reached the recipient? For decades, the traditional registered letter with acknowledgement of receipt has been regarded as a reliable solution, as it combines personal delivery with proof of receipt that can serve as evidence in the event of a dispute.

In today’s digital working environment, electronic signature solutions offer a legally compliant way to transmit documents while clearly documenting both delivery and document integrity. They enable transparent processes, faster workflows, and greater efficiency, particularly in the B2B sector. This guide explains how registered letters with acknowledgement of receipt work, what costs are involved, and why modern electronic signature solutions are often the more practical alternative.

Key facts at a glance

What it is: A registered letter with acknowledgement of receipt is a postal delivery method where the item is handed over against signature and the sender receives proof of delivery (the acknowledgement of receipt).
What it costs: The additional fee is currently €4.85 plus standard postage (as of 2026, Deutsche Post AG). The total price depends on the letter format and weight.
What it is used for: It serves as legally recognised proof of delivery and is commonly used for termination notices, objections, deadline-sensitive documents, and correspondence with authorities or courts.
What alternatives exist: By using an electronic signature solution, registered letters with acknowledgement of receipt are no longer necessary in many cases.

Definition: what is a registered letter with acknowledgement of receipt?

A registered letter with acknowledgement of receipt is a postal delivery service where the recipient must sign upon receipt and the sender receives confirmation of delivery in the form of an acknowledgement slip, either physically or digitally.

Once delivery has been completed successfully, the sender receives confirmation containing the recipient’s signature, the delivery date, and a scan of the delivered item. This creates documented proof of delivery that can be used in legal disputes.

The three most important aspects at a glance

How much does a registered letter with acknowledgement of receipt cost?

The total cost always consists of two components:

Component	Price in 2026 for domestic delivery within Germany (Deutsche Post AG)
Standard postage (depending on format)	e.g. €0.95 (standard letter) to €1.80 (large letter)
Registered delivery with acknowledgement of receipt surcharge	+ €4.85
Example: compact letter with acknowledgement of receipt	approx. €5.95

Please note: Prices for registered delivery add on services have remained unchanged since January 2025 and continue to apply in 2026. Standard postage rates were adjusted on 1 January 2025.

How does a registered letter with acknowledgement of receipt work?

Posting the item at a Deutsche Post branch office (this service cannot be booked online)
Proof of posting including a tracking number is issued
Delivery is made personally to an authorised recipient against signature
Acknowledgement of receipt is automatically returned to the sender in digitalised form
Online proof of delivery can additionally be viewed via Deutsche Post’s tracking portal

Important since October 2022: The manual completion and attachment of the traditional pink acknowledgement form is no longer required. The process is now fully automated.

What proof does the sender receive?

Physical or digital acknowledgement of receipt with the recipient’s signature
Delivery date and timestamp
Scan of the delivered item
Delivery confirmation accessible via Deutsche Post’s online tracking portal

This proof is regarded by German courts as strong evidence that a document has been delivered, although it does not constitute irrefutable proof.

Digital alternatives to registered letters with acknowledgement of receipt

Why traditional postal delivery reaches its limits

Registered letters with acknowledgement of receipt are a tried and tested method. However, companies dealing with large volumes of documents often face significant costs and time expenditure due to branch visits, waiting times and physical mail processes. In addition, the proof only confirms delivery of the envelope, not the contents of the document.

More structure, less effort: electronic signatures as an alternative

For businesses that regularly send legally relevant documents, electronic signature solutions offer a fully digital and traceable alternative. inSign is a solution developed and hosted in Germany for simple, advanced and qualified electronic signatures in accordance with eIDAS regulations. It enables companies to deliver documents digitally in a legally compliant way, obtain signatures and fully track the entire process.

How digital delivery with inSign works in practice

Upload the document, for example a contract, termination notice or declaration of consent
Invite the recipient via email with identification, no dedicated account required
The recipient signs digitally on their own device, regardless of location
The signed document is automatically archived and can be accessed at any time
Audit trails document timestamps, identity verification and the signature process in full

About the inSign electronic signature

With inSign, you can send important documents digitally, saving both time and money. Every step is clearly documented and can be accessed at any time.

Conclusion: why B2B companies should use digital signature solutions

Registered letters with acknowledgement of receipt remain a proven method for verifiable postal delivery, particularly where no digital communication channel is available or desired. However, businesses with structured document management processes should consider the advantages of electronic signature solutions. In many cases, they are faster, more cost effective and provide more comprehensive proof of delivery and document integrity. The right choice ultimately depends on the individual case, the recipient and the applicable legal requirements.

FAQ: frequently asked questions about registered letters with acknowledgement of receipt

What is the difference between a signed for delivery and a registered letter with acknowledgement of receipt?

With a standard signed for delivery, the postal worker only documents that the item has been placed in the recipient’s letterbox. With acknowledgement of receipt, delivery is made personally against signature. The sender then receives confirmation including the signature, date and scan of the delivered item.

How much does a registered letter with acknowledgement of receipt cost in 2026?

The additional fee for the acknowledgement service is €4.85 plus standard postage. Depending on the letter format, the total price ranges from approximately €5.90 to €7.65.

Is the acknowledgement of receipt legally conclusive proof of delivery?

The acknowledgement confirms delivery and creates a strong presumption that the document was received. However, it is not absolute proof. In some cases, the recipient may still dispute having received the actual contents. For highly sensitive legal matters, professional legal advice is recommended. Electronic signature solutions such as inSign additionally protect documents against manipulation and are often the better alternative in B2B environments.

Can a registered letter with acknowledgement of receipt be sent online?

No. This service must be submitted at a Deutsche Post branch office and cannot currently be booked online. Standard registered mail without acknowledgement of receipt can be franked online using Deutsche Post’s online postage service.

Which documents are typically sent using this method?

Typical B2B use cases include termination notices, formal warnings, objections, deadline sensitive documents, official correspondence and contract offers with acceptance deadlines. Payment reminders with formal deadlines are also commonly sent this way.

This article has been carefully researched and is based on the current tariffs and terms and conditions of Deutsche Post AG (as of 2026). For individual legal matters, consultation with a qualified solicitor is recommended.

About the author

Christina Detling

As Online Marketing Manager at inSign GmbH, I manage the content, SEO and SEA strategy for Germany's leading electronic signature solution. With a focus on B2B marketing, I drive lead generation and the optimisation of digital customer journeys. My background in Business Informatics (B.Sc.) bridges technical understanding with strategic marketing expertise, a combination I have been putting into practice at inSign since 2019. I use inSign myself and am genuinely convinced by the solution: straightforward, legally compliant and efficient. It is a tool I recommend without hesitation.