Introduction

Payment validation is used to approve or reject payments before they are sent or when they are received. Common payment validations include checking:

The status of an internal account before confirming or rejecting a payment received
If a beneficiary is on a sanctions list before sending a payment
If a direct debit mandate is not blocked when receiving a direct debit payment
If a payment type and an amount are allowed for an internal account

Payment validation rules

Validations are managed via payment validation rules that group and orchestrate the execution of validations for a target payment flow (outgoing SCT Instant, incoming SDD, etc.)

A rule is defined by its:

Criteria, defining the payments (payment orders or incoming payments) this rule will apply to. Supported criteria are connected accounts, payment types, and directions
Validations which is the list of validations to be performed on these payments. Each check has a list of possible outcomes mapped to 3 different actions:
- Move to next validation
- Approve payment order (or confirm incoming payment)
- Cancel payment order (or reject incoming payment)

// Example of a payment validation rule for outgoing SCT Instant, checking whether the internal account is active and performing a PEP screening on the reciving account holder

{
  "id": "7c149cf6-0306-4a45-b48c-b3562c39ab2b",
  "object": "payment_validation_rule",
  "name": "Internal account & PEP screening",
  "scope": "payment_order",
  "criteria": [
    {
      "attribute": "connected_account_id",
      "extra": null,
      "operator": "in",
      "values": ["7c149cf6-0306-4a45-b48c-b3562c39ab2b"]
    },
    {
      "attribute": "payment_direction",
      "extra": null,
      "operator": "equals",
      "values": ["credit"]
    },
    {
      "attribute": "payment_type","extra": null,
      "operator": "equals",
      "values": ["sepa_instant"]
    }
  ],
  "validations":[
    [
      {
        "type": "is_internal_account_active",
        "outcomes": [
          {
            "status": "successful",
            "action": "next_validation"
          },
          {
            "status": "failed",
            "action": "cancel_payment"
          }
        ]
      }
    ],
    [
      {
        "type": "pep_screening",
        "outcomes": [
          {
            "status": "successful",
            "action": "approve_payment"
          },
          {
            "status": "failed",
            "action": "cancel_payment"
          }
        ]
      }
    ]
  ]
}

Validations

Mambu Payments (formerly Numeral) currently supports two types of validations:

Custom validations performed by your systems based on your internal logic and data providers
Pre-built validations performed on Mambu Payments (formerly Numeral) objects and data, like internal accounts, direct debit mandates, external account reachability etc. which can be configured for your business needs

Async custom validations

Mambu Payments (formerly Numeral) sends an event to your webhook when a validation in your system is required. The result of the validation can be shared using the dedicated API endpoint.

Sync payment validation

Mambu Payments (formerly Numeral) calls an endpoint (in your system or in a third-party system). The result of the validation is shared in the HTTP session.

Pre-built validations

Mambu Payments (formerly Numeral) manages the validations based on your configuration.

Payment validation flow

A payment order created or an incoming payment received include:

A payment validation status
The list of associated payment validation rules and, for each rule, a completion status and the list of associated validations with their status and result

Below is an example of a payment order with 2 payment validations:

// First validation of the internal account status is in progress

{
  "id": "b38f5318-a389-4278-9cbe-d16116750987",
  "object": "payment_order",
  "status": "pending_approval",
  
  // Only a subset of the object is displayed to enhance clarity.
  
  "payment_validation": {
    "status": "in_progress",
    "validation_results": [
      {
        "payment_validation_rule_id": "7c149cf6-0306-4a45-b48c-b3562c39ab2b",
        "status": "in_progress", 
        "validations": [
          [
            {
              "type": "internal_account_is_active",
              "status": "in_progress",
              "status_details": null,
              "resource_id": "some ID",
              "resource_url": "https://someurl.com/someid"
            }
          ],
          [
            {
              "type": "pep_screening",
              "status": "queued",
              "status_details": null,
              "resource_id": null,
              "resource_url": null
            }
          ]
        ]
      }
		]
	}
}

// First validation is successful. Second validation of PEP screening is in progress

{
  "id": "b38f5318-a389-4278-9cbe-d16116750987",
  "object": "payment_order",
  "status": "pending_apprvoal",
  
  // Only a subset of the object is displayed to enhance clarity.
  
  "payment_validation": {
    "status": "in_progress",
    "validation_results": [
      {
        "payment_validation_rule_id": "7c149cf6-0306-4a45-b48c-b3562c39ab2b",
        "status": "in_progress", 
        "validations": [
          [
            {
              "type": "internal_account_is_active",
              "status": "successful",
              "status_details": null,
              "resource_id": "some ID",
              "resource_url": "https://someurl.com/someid"
            }
          ],
          [
            {
              "type": "pep_screening",
              "status": "in_progress",
              "status_details": null,
              "resource_id": "some ID",
              "resource_url": "https://someurl.com/someid"
            }
          ]
        ]
      }
		]
	}
}

// All validations are successful and payment is approved

{
  "id": "b38f5318-a389-4278-9cbe-d16116750987",
  "object": "payment_order",
  "status": "approved",
  
  // Only a subset of the object is displayed to enhance clarity.
  
  "payment_validation": {
    "status": "successful",
    "validation_results": [
      {
        "payment_validation_rule_id": "7c149cf6-0306-4a45-b48c-b3562c39ab2b",
        "status": "successful", 
        "validations": [
          [
            {
              "type": "internal_account_is_active",
              "status": "successful",
              "status_details": null,
              "resource_id": "some ID",
              "resource_url": "https://someurl.com/someid"
            }
          ],
          [
            {
              "type": "pep_screening",
              "status": "successful",
              "status_details": null,
              "resource_id": "some ID",
              "resource_url": "https://someurl.com/someid"
            }
          ]
        ]
      }
		]
	}
}