How I was able to send an important letter without stamps

The other day, I was very excited to order a TV online and I paid it immediately. I was already informed on the website that there might be a delay in delivery. I waited. Two whole weeks. Then I received an email that the delivery date would be postponed by another week. In the meantime, almost two more weeks have passed. To complain, I could send a registered letter. That way I can make sure that the retailer receives my reclamation in a traceable way. But couldn't it be easier? I have neither envelopes nor stamps at home.

Registered email: What is this?

A registered email works in exactly the same way as a registered letter - but electronically. An email is written as usual and optional attachments are added. With a few clicks, the email can then be sent with Track and Trace (just like a parcel!). When the recipient has received the message, the sender receives a registered receipt. In this registered receipt, the following information is digitally signed and tamper-proof:

• Encrypted, original e-mail with all attachments
• Facts about the delivery (server dialogues and other transmission data for proof of the delivery process)
• Proof of delivery
• digital fingerprints
• respective time information

All these details can even be used in the event of a legal dispute, as the originality of the e-mail and compliance can be proven.