They always answer right away to any question I have, they provide clear answers, and they are very patient even when I struggle to understand. They try to explain in different ways. They are very helpful, responsive and friendly.
It may happen that you need to cancel a sales invoice, and/or refund part of your income to a client. This can be easily done by issuing a Cancellation Invoice. In this article, we explain how this works and what to do in the app.
A Cancellation Invoice is an official financial document sent to a customer to formally nullify a previously issued invoice.
It can either:
Reverse the full amount
Offset part of it in case of a partial refund
By issuing a cancellation invoice, the original invoice becomes invalid in your accounting system, preventing duplication, errors, or incorrect tax reporting.
You need a cancellation invoice in situations such as:
Full cancellation of a sale
Customer cancels the order before or after payment.
Partial refunds
Customer returns part of an order or you reduce the agreed fee.
Errors on the original invoice
Wrong amount, incorrect currency, VAT/tax number missing, or other incorrect details.
Price changes
Over- or understatements.
Goods or service issues
Items damaged in transit, rejected service, or overpayment.
Tax adjustments
Wrong VAT rate or exemption applied.
By issuing a cancellation invoice, the original invoice is officially nullified in your accounting system. This process ensures that the incorrect invoice is no longer valid, preventing any confusion or errors in your bookkeeping. Once the cancellation is sent out, you have to create and send a new, corrected invoice.
Properly handling cancellation invoices is essential for maintaining transparent and accurate financial records. It also helps avoid situations where amounts are mistakenly recorded twice, which can lead to discrepancies in your tax reporting or accounting.
Example: If your client return goods back to you against which the invoice and payment is already issued, rather than deleting the invoice and paying back off the record, an official Cancellation Invoice is issued against the initial invoice to offset the impact of the amount as well as the VAT.
In practical terms, a Cancellation Invoice adds a negative income into your accounting, and will reduce your income.
Your accounting will look like so:
Original invoice = +100€
Cancellation Invoice for partial refund = -50€
Total income = +50€
There are several important elements that a cancellation invoice must contain to be legally and professionally valid:
The term "Cancellation Invoice" should be clearly stated on the document.
A negative amount can be included to offset the original invoice, although this is not strictly required as long as the document is clearly labeled as a cancellation.
The cancellation invoice must contain all mandatory details identical to the original invoice, including:
Name and address of the sender and recipient
Tax number or VAT ID
Invoice number
Invoice date
Description of goods or services provided
Any applicable taxes
Note: A cancellation invoice is not the same as a credit note. These are different financial documents used in different contexts.
Once your cancellation invoice is prepared, don’t forget to send it to your customer to officially document the cancellation of the original invoice. After that, you can go ahead and create a new, corrected invoice with the updated and accurate details.
From the revenue screen, simply click the "+" button > Create Cancellation invoice
Add the details (client, service/product you want to cancel)
Add a note which original invoice you want to cancel or choose an invoice number that refers to the original one
Finalize the document and send it to your client

⚠️ Very important: Once you sent the cancellation invoice to your client, make sure to mark it as paid (it need's to be the same status as the original invoice, to be considered for your bookkeeping). So your original invoice and your cancelled invoice should be marked as paid or either both as not paid.
Depending on your situation you might stop at this point. This is the case if you only had to cancel a part of your original invoice. But in case some information was missing like your tax number, you need to issue a new invoice with all the correct data.
With regards to the new invoice, make sure that you include all the necessary information.
There are strict rules set out by the German government on what a legally valid invoice has to look like. You can of course choose which font to use and include your logo, but the content of the invoice should contain at least the following information:
Your full name
Your (professional) address
The full name and address of the invoice recipient
Your tax number or, if applicable, your VAT number
The date your invoice was created
A consecutive invoice number
The quantity and a description of the goods delivered or the nature and scope of a service provided
The price for the listed services
The date of delivery or performance of the service
The applied VAT rate for the services rendered
You may also be required to provide any of the following optional additional information:
Details of any discounts
References to a tax exemption e.g. §19 Kleinunternehmer or §4 exemption
⚠️ Very important: Please make sure to date back all the dates (same as the original invoice).
If you have further questions about cancellation invoices or issuing new invoices, please contact us via taxcoach@accountable.eu - we are here to help! :)
🎥 Would you rather watch it live than read about it? In our Accountable Live webinar, we’ll guide you step by step through the web version – from your first entry right through to your tax return. Register here!
Author - Valesca Wilms
As content marketing lead at Accountable Belgium, Valesca writes about freelancing, self-employment, and taxes based on her own experience as a freelancer.
Who is Valesca ?Thank you for your feedback!
Useful
As a self-employed individual with a sole proprietorship, your income is taxed under the personal in...
Read moreStarting from 2026, all self-employed individuals will need to send their invoices electronically in...
Read moreThe VAT reverse charge is a complicated word for a simple concept. It helps you purchase and sell sm...
Read moreThey always answer right away to any question I have, they provide clear answers, and they are very patient even when I struggle to understand. They try to explain in different ways. They are very helpful, responsive and friendly.
Everything was great! All my questions were answered quickly and in a friendly manner.
In the world where everyone seems to be out to get small entrepreneurs and overwhelm them with new rules, more taxes and reporting obligations, Accountable often feels like the one steady partner that actually wants you to succeed, providing quick, clear and personalised support. Thank you!
This is an amazing application with great support on issues. In short as in day I am addicted to it (in a positive way). I myself is from IT project management and the way they have captured the user requirement, it’s phenomenal.
UI is great. Feature packed and very easy to use. The team at Accountable were VERY quick to respond and their team of technicians soon had a fix in place. Very happy with the level of service so far. Thumbs up from me!
This program is a lifesaver, and it is always improving. Plus, it has an AI chat feature that is actually useful.
The coaching session on tax management was excellent, good material, excellent explanations and very insightful. Combined with the AI I never feel alone with Accountable.
The availability of your team to help and guide people to understand their finances better is what really makes Accountable valuable. While the AI is able to give answers to most basic questions, specific scenarios need counsel from a human which your team performs beautifully.
Fast and careful answers from Alina. Top service. Thank you.
They always answer for questions wherever is via direct e-mail or through app. If they can’t answer fully they will forward you to the right place. Documents were always prepared well and ready to send further to government. Everything is intuitive in the app and easy to sort out even for someone completely green in this field.