Go to Settings > Invoices > General settings. Check 'Invoice to different company/person':
You can then select a divergent debtor on each sales trajectory and on each project:
The invoice will then automatically be prepared for the divergent debtor and, after sending, will also be visible in the invoices on the CRM card of the divergent debtor.
Invoicing multiple relations
With this functionality, it is also possible to invoice multiple debtors. You do this by unchecking 'Invoice to divergent company/person'. You then create a draft invoice and you can invoice this to debtor 1.
After invoicing the first part, you go back to the project and check 'Invoice to divergent company/person' and select debtor 2. You then create a draft invoice for the second part and send the invoice to debtor 2.
Tip: do you want to invoice one fixed price service to two debtors? Then create a fixed price with installments, so you can invoice the different installments to different debtors.