Because the VOP scheme does not provide a test environment, Mambu Payments (formerly Numeral) provides its own test environment to simulate incoming and outgoing VOP requests to test your integration in sandbox.

Simulate outgoing VOP requests

To simulate outgoing VOP requests, use any of our pre-defined payee account numbers, payee identification types, and payee identifications to test different scenarios. Mambu Payments (formerly Numeral) will automatically reply with pre-defined responses.

Simulate incoming VOP requests

Incoming VOP requests can be simulated:

• In the API using the Simulate incoming payee verification request API endpoint
• In the dashboard with VOP > Incoming VOP requests > Simulate VOP request