A guide to e-invoicing

Electronic invoicing

The number of sent e-invoices is constantly growing and there are more and more companies and organizations that only accept electronic invoices. Sending e-invoices has been made as easy as possible with Isolta, but there are still a few things that you should know before sending e-invoices.

This article contains the most important issues and frequently asked questions about e-invoicing. We encourage everyone to read through the sections before sending the first e-invoice.


What is an e-invoice address and where can I find it?

E-invoice address is the senders or receivers address that is used to send e-invoices.

Take note! Make sure to check the spelling of both the e-invoice and the operators address before sending an invoice A faulty address is the most common reason why an e-invoice will get lost in the transition.


Which information is compulsory in an e-invoice?

The tax-officials require you to have the following information on the invoice:

  • Receivers address, postal code and post office
  • Your bank account information

In addition to this, you of course also need the customers e-invoice information. More information about compulsory invoice information can be found here.


Do e-invoices have limitations with the amount of characters or information?

E-invoices are sent as a standard e-invoice form. The standard dictates the amount of information that can be send in an e-invoice. For example the maximum amount of characters in a field. The standard ensures that all of the information in the invoice can be correctly transferred to the customer.

A few examples of the limitations:

  • The senders WWW address can not be over 35 characters long
  • The maximum amount of characters in an invoice row is 100

So e-invoices have certain limitations as to how many characters certain fields can have. Isolta will not allow you to send an e-invoice unless all the requirements of the standard are met.


Can I send attachments with e-invoices?

But of course! You can attach the following file formats to e-invoices: pdf, jpg, png, doc, docx, xls, xlsx, odt, ods. You can attach up to 10 files to a single invoice. The maximum size of the attached files is 1 Mb.

The previous limitations are set by Isolta but other invoicing systems and e-invoice operators might have their own limitations. It is recommended to check from the receiver, what types of files they can receive as an attachment. The most commonly supported file type is .pdf so you should use it whenever possible.


Hurray, I sent my first e-invoice! How do I know my customer received it?

We will inform you if there are problems with the delivery. Unless you hear from us, you can expect the invoice to be delivered. In the future we will add the possibility to follow the sending-process yourself.


What does the e-invoicing cost?

You can check the current prices from our website


How do I pay for the sent e-invoices?

We will send you an invoice of the costs. We usually send the invoice when the costs exceed 10-15 €. The costs can also be added to you Isolta bill if you are using a paid subscription of the service.


Want to know more? Contact us!

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