The debtor number is the same as your customer number. You will only see a debtor number on your invoice. This is because you are a debtors to us, financially.

Where can I find my customer number?
You can find your customer number on your invoice. Here it’s described as a debtor number. You can also find this number in the app under 'account details' - 'personal details' and when you log in to the website under 'My profile'.

NS-Business Card customers or customers via Shuttel, Mobiliteitsfabriek, Figo, MobilityMixx, and Moves are only debtors to Greenwheels and non-customers, because payments are handled by this third party.