Moon Invoice allows you to duplicate a customer and add them as a vendor

Below are the steps you need to follow.

1. Open the Moon Invoice application on your device, or tap this link.
2. Navigate to Sales > Customers.
3. Click on the three-dot icon in the top-right corner.
4. Select Duplicate > Vendor.
5. Navigate to Purchases > Vendors to view the newly added vendor.

                                                                                                                                              - Moon Invoice