Invoicing in e-commerce

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Everything you need to know about error-free invoices in e-commerce

E-commerce is more than just an online store. It’s about professionalism, trust and, last but not least, legally compliant invoices. This guide provides you with all the information you need for correct invoicing in e-commerce.

  • Why is correct invoicing so important in online retail?

    Imagine your online store is running like clockwork, but then your customers stumble across incorrect invoices issued by you. This can quickly destroy the good reputation you have built up. Violations can lead to financial and legal consequences, including tax penalties.

  • The importance of accurate invoices in e-commerce should not be underestimated – it is the foundation for building trust and legal certainty.

The key elements of a legally compliant invoice

What makes an invoice legally compliant? Here you will find the most important key points that should be included in every invoice.

Full names and addresses of invoice issuer and recipient

Who are you and who is your customer? These basics need to be clear. The invoice should contain the full contact details of both parties to avoid any confusion.

Tax or sales tax identification number

When it comes to the tax office, a correct identification number is mandatory. Make sure that this is clearly stated on the invoice. Both numbers are important for the tax treatment of the transaction and must be stated.

Unique invoice number

Each invoice should have a unique invoice number to ensure easy traceability.

Invoice date

The date of invoice issue should be clearly stated.

Detailed list of goods delivered or services rendered

An unclear item on the invoice can be a nuisance for your customer. List exactly which items or services your customer is paying the invoice for.

Indication of the tax rate and the amount of tax to be paid

Different tax rates may apply depending on the product or service. This must be shown correctly and transparently on the invoice.

Documentation obligations and storage of invoices

You are obliged to keep all invoices for a period of at least 10 years. This is both for your own bookkeeping and for possible tax audits.

The importance of consecutive invoice numbers and
tax identification numbers

The structure and organization behind the scenes of an e-commerce business can be just as important as the presentation of the products themselves. Two key pillars of this organization are the sequential invoice numbers and the tax identification numbers. These components are not only essential for internal bookkeeping and accounting, but are also an integral part of legal requirements and customer service.

Consecutive invoice numbers: Why consistency counts

The consecutive invoice number is unique for each transaction and plays a crucial role in setting up a traceable and organized invoice system. The seamless sequence of these numbers makes it possible to clearly identify each invoice, which is extremely important in the event of queries, refunds or warranty claims. For the tax office, the invoice number is proof of the completeness of your bookkeeping and an important aid during tax audits.

Tax or VAT identification numbers are a must have on every invoice in order to ensure tax registration and processing. These numbers connect your business directly to the tax databases and facilitate the processing of advance VAT returns and annual financial statements. The correct indication of these numbers is a sign of the transparency and reliability of your company and promotes trust among your customers, as they know that your business complies with the legal requirements.

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Electronic invoicing and its advantages

Digitization has not stopped at invoicing. Find out how e-invoices increase efficiency, cut costs and reduce paper consumption. They also facilitate archiving and access to historical data.

Legally compliant electronic signatures

In the digital world of e-commerce, electronic signatures are indispensable for ensuring legal validity and authenticity. They enable fast and secure confirmation of invoice transactions and are crucial for maintaining the integrity of digital documents.

Automated data acquisition and processing

Automation is the key to efficient invoicing. By using intelligent systems for data collection and processing, errors can be reduced, time saved and customer satisfaction increased. This also facilitates the reporting and analysis of financial transactions.

Integration into existing merchandise management systems

The integration of invoicing into your merchandise management system ensures seamless processing from order to payment. This improves data consistency, avoids duplication of work and provides a better overview of your business processes. Invoicing in e-commerce is that easy!

Security aspects of invoicing

Data protection and data security are of the utmost importance in online retail. Find out how you can protect the data of your customers and your company and at the same time ensure secure invoicing.

Encryption of sensitive data

Encrypting sensitive data is a crucial step in securing customer information. When invoicing, personal data and transaction details must be protected by modern encryption technologies to prevent data leaks and cyber attacks.

Compliance with the General Data Protection Regulation (GDPR)

Compliance with the General Data Protection Regulation (GDPR) is mandatory for all e-commerce companies operating in the EU. This includes implementing data security measures, providing transparent information about data processing and safeguarding the rights of data subjects when issuing invoices.

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Dealing with returns and credit notes

Returns are a daily part of e-commerce. Here we show you how to create credit notes and corrected invoices that are both customer-friendly and legally compliant.

Creation of credit notes

The creation of credit notes or invoice corrections is an indispensable part of customer service in e-commerce. In the event of returns or service errors, credit notes enable a quick and uncomplicated refund to the customer, which strengthens customer satisfaction and loyalty.

Adjustments for returns

Returns are part of everyday life in online retail. Flexible handling and correct adjustments to invoices are required to ensure a transparent and trusting customer relationship. This includes updating stock levels and adjusting financial records to correctly reflect the returns process.


Accurate invoicing is essential for customer confidence and legal security in e-commerce. It includes accurate contact details, tax IDs, clear invoice numbers, the invoice date and a precise breakdown of the items and services sold, including tax rates. Consecutive invoice numbers ensure traceability for accounting and tax audits. Electronic invoices increase efficiency and reduce costs, while data protection measures protect customer data. Customer-oriented management of returns and credit notes rounds off the professional invoicing process.

With easybill, invoicing is simplified. The platform automates all of the above aspects and supports the management of returns and credit notes, allowing companies to focus on their core business.

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