Invoicing
Invoice information
To ensure correct and prompt processing , all invoices must meet the requirements below .
Invoices that do not meet the requirements will be returned and may result in delayed payment .
Approved invoice formats
We only accept invoices in the following formats :
✔ PDF via email
✔ E-invoice via Peppol
❌ Paper invoices are not accepted
❌ Images (e.g. JPG/PNG) are not accepted
Send invoice
Email (PDF):
📧 invoice@flowline.se
E-invoice:
📄 Via the Peppol network (Swedish standard)
Mandatory marking – AO number
All invoices must contain the correct AO number .
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The AO number must be clearly stated on the invoice.
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The AO number must refer to the correct project or assignment.
Example:
VVS-BRF01-001
⚠️ Invoices without the correct AO number cannot be processed .
Invoice content requirements
The invoice should always contain:
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AO number
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Project name or customer reference
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Clear specification of work performed or delivery
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Invoice date and invoice number
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Invoice amount and VAT according to current regulations
Invoices are not sent to project managers
All invoices should be sent to faktura@flowline.se or via Peppol .
Invoices sent directly to project managers, supervisors, or other personnel are not processed .
Questions about invoices
When inquiring, always state the AO number and invoice number .