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Fellowmind Finland E-Invoice — User Guide

What is Fellowmind Finland E-Invoice?

Fellowmind Finland E-Invoice is a Business Central app that makes it easy to send electronic invoices (e-invoices) to your customers. It creates Finvoice 3.0 e-invoices compliant with the EN 16931 European e-invoicing standard, which your bank or e-invoice operator can deliver to your customers automatically — no manual PDF attachments or paper needed.

With this app you can:

  • Send sales invoices, credit memos, service invoices, and service credit memos as e-invoices
  • Include PDF printouts and attachments inside the e-invoice
  • Export e-invoices as ZIP files you upload to your operator, or send them directly to Azure Blob Storage
  • Send e-invoices directly to the OWS operator API
  • Import incoming e-invoices from your operator
  • Send invoice data to a factoring bank

For detailed field references, setup tables, and developer extensibility information, see technical.md.

Getting started

1. Install the app

Install Fellowmind Finland E-Invoice from Microsoft AppSource or from the Extension Management page in Business Central. The app creates default settings automatically so you can start exploring right away.

2. Set up your company's e-invoice details

Search for E-Invoice Setup in Business Central and fill in:

  • E-Invoice Address — your company's e-invoice address (typically your OVT code)
  • Intermediator Code — the code of your e-invoice operator (bank or service provider)
  • Choose whether to send e-invoices to all customers or only to customers you enable individually

You can also enable validation so the app checks your e-invoices for errors before you send them.

3. Set up your customers

On each customer's Customer Card, fill in:

  • E-Invoice Address — the customer's e-invoice address (OVT code)
  • Intermediator Code — the customer's operator code
  • Enable E-Invoice — set to Yes to send e-invoices to this customer (or leave on Default if you enabled e-invoicing for all customers globally)

Optionally, enter the customer's Business Identity Code (Y-tunnus).

4. Configure bank accounts

If you want specific bank accounts to appear on your e-invoices, set them up on the E-Invoice Bank Detail Card page. Otherwise, the app uses the bank information from your Company Information.

5. Configure OWS integration

If you want to send invoices directly to OWS through their API, open E-Invoice Setup and fill in the OWS section:

  • OWS Enabled — enable the integration
  • OWS Environment — choose Test, Production, or Custom
  • OWS Base URL — filled automatically for Test and Production; only editable for Custom
  • OWS Company ID — value used in the Company-ID header
  • OWS API Client Id and OWS API Client Secret — credentials used for OWS authentication
  • OWS Skip Duplicate Check — controls the duplicate-check flag sent to OWS
  • OWS Include Attachments — includes document attachments in the API request
  • OWS Receiver ID — optional receiver identifier for OWS routing

The client secret is stored securely and shown as a masked value in the setup page.

Sending e-invoices

The E-Invoice Worksheet is where you prepare and send your e-invoices. It works like a journal — you fill it with invoices, check them, and export.

Step 1 — Add invoices to the worksheet

  1. Open the E-Invoice Worksheet (search for it in Business Central)
  2. Select a worksheet name from the dropdown
  3. Click Suggest E-Invoices — the app finds all posted invoices ready to be sent as e-invoices

The app only picks up invoices for customers who have e-invoicing enabled, and it won't add duplicates.

Step 2 — Review

Before exporting, you can:

  • Preview E-Invoice Data — see exactly what the e-invoice will look like
  • Show Document — open the original posted invoice
  • Validate Invoice — check the e-invoice for errors

The bottom of the worksheet shows the total number of invoices and the total amounts.

Step 3 — Export

Click Export E-Invoices and choose to export all invoices or just selected ones.

Depending on your setup, the export will either:

  • Download a ZIP file — containing all e-invoice files, ready to upload to your operator
  • Download a ZIP with attachments — same as above but includes PDF printouts and other attachments
  • Send to Azure Blob Storage — uploads directly to your cloud storage
  • Send to OWS API — posts the invoice directly to OWS and records the response in the OWS send log

After a successful export, each invoice is automatically marked as sent with the date and time.

Sending through OWS API

To use the OWS integration:

  1. Open E-Invoice Worksheet
  2. Select the worksheet name EXP.OWS
  3. Add invoices with Suggest E-Invoices or manually
  4. Review and validate the invoices if needed
  5. Click Export E-Invoices

The app generates the Finvoice data, authenticates against OWS, and sends each invoice to the OWS Send API. If OWS accepts the invoice, the worksheet line is marked as sent.

If the send fails, the invoice is not marked as sent and the response is written to the OWS send log.

OWS send log and troubleshooting

Use OWS Send Log from the worksheet to review what happened during OWS exports. The log stores:

  • Send time and worksheet code
  • Document number and account number
  • HTTP status code
  • OWS tracking ID, status, response code, and message
  • Error text
  • The exact request payload sent to OWS
  • The exact raw response returned by OWS

This is especially useful when OWS returns routing errors such as No valid routing was found for the message. You can download both the saved request payload and the saved raw response from the log page and share them with OWS support for analysis.

The OWS send log also includes cleanup actions for deleting entries older than 7 days, older than 30 days, or deleting all entries.

Attachments

You can include attachments (like PDF printouts) in your e-invoices:

  1. Enable Include Attachments in E-Invoice Setup
  2. Optionally enable Auto Generate Invoice Printout to have the app create a PDF automatically
  3. Any files attached to the invoice via Business Central's standard Document Attachment feature will be included

The worksheet shows an Attachments FactBox so you can see what's attached to each invoice.

Factoring

If you use invoice factoring, the app can send invoice data to your factoring bank:

  1. Use Suggest Factoring Invoices to fill the worksheet with eligible invoices
  2. Mark invoices for factoring and assign the factoring bank account
  3. Export as usual — the factoring data is included

Re-sending an invoice

If you need to re-send an invoice, simply toggle the E-Invoice Sent field back to No on the worksheet line, then export again.

FAQ

Q: Which e-invoice operators does the app work with? A: All Finnish operators. The app creates standard Finvoice 3.0 files that any operator accepts. You upload the files to your operator yourself (or use Azure Blob Storage for automatic delivery).

Q: What happens if the export fails? A: Nothing is marked as sent. You can fix the issue and try again.

Q: Do I need Azure Blob Storage? A: No. You can download e-invoices as ZIP files and upload them to your operator manually. Azure Blob Storage is an optional convenience for automated workflows.

Q: Do I need OWS to use this app? A: No. OWS is an optional export method. You can continue using ZIP export or Azure Blob Storage if that matches your operator workflow.

Q: What happens if OWS rejects the invoice? A: The invoice is not marked as sent. Check the OWS Send Log and inspect the saved request payload and raw response to see what was sent and what OWS returned.

Q: Where do I find detailed setup fields and developer information? A: See the Technical & Consultant Reference.