eConnect processes the following file types:

ZUGFeRD/Factur-X (hybrid PDF with embedded XML) is also supported. The platform first attempts to process the embedded XML; if it is not valid, the PDF is processed via OCR.

Submitting documents via the API instead of by email? A higher limit of up to 15 MB per file applies. Read more about submitting via the IDR API.

Always send one invoice per file. If an invoice has multiple pages, combine them into a single PDF file. The platform processes each file as a separate document. If a PDF contains multiple invoices, the conversion task is rejected with the message "Document contains multiple documents".

The cover page method is not supported: a self-added cover page cannot be used to guide recognition. Also do not combine multiple documents into a single PDF file.

The correct approach is the opposite: first submit the original invoice and then enrich the recognised invoice in your own software with additional information.

Exception for expense declarations: with a declaration, a cover page is sometimes used. In that case the IDR only recognises the cover page; the document is then treated as a simplified invoice, meaning fewer data fields are recognised.

Note that images in email signatures and company logos count as attachments. If your email programme automatically includes a logo, this counts toward the maximum of 50 attachments and may affect classification. The system automatically recognises most logos via the Detect API and filters them out, but in some cases a logo may incorrectly be processed as a document.

When you send one invoice with supporting documents (specifications, packing slips, timesheets) in the same email, the supporting documents are automatically attached to the invoice.

If you send multiple invoices together with attachments in one email, the system cannot determine which attachment belongs to which invoice. In that case, send separate emails per invoice.

PDF files with encryption, digital signatures or other restrictions cannot be read by the OCR engine. These are rejected with the message "Document protected". Remove the protection before submitting the file, or ask the supplier for an unprotected version.

PDF conversion (OCR recognition) is available for invoices addressed to all organisations available on the platform. It does not matter whether the recipient is a Dutch, Belgian or other foreign organisation. The IDR supports more than 200 languages for text recognition, so invoices in virtually any language are recognised.

Tip: unsure whether your file meets the requirements? Submit a test invoice and check whether it is processed correctly. If an error occurs you will receive a clear error message with the reason.