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Version: v1

Refunds and Voids

Use the POST /payments/{id}/reverse endpoint to refund a captured payment or void an uncaptured authorization. The same endpoint handles both operations — ODUS decides which action to perform based on the current state of the payment.

Prerequisites​

  • You need a Secret API Key to call the reverse endpoint.
  • The payment must have status: "succeeded" and must not be fully reversed (isFullyReversed: false).

Full refund​

To refund the entire captured amount, send a POST /payments/{id}/reverse request with an empty body.

Full refund — request body
{}

ODUS will refund the remaining unreversed amount (amountCaptured - amountReversed) to the customer.

From the Dashboard​

  1. Open the payment details page.
  2. Click Refund.
  3. Enter the full amount and click Refund.

Partial refund​

To refund a specific amount, include the amount field in minor currency units (for example, 500 for $5.00 USD).

Partial refund — request body
{
  "amount": 500
}

You can issue multiple partial refunds against the same payment. The total refunded amount cannot exceed amountCaptured.

From the Dashboard​

  1. Open the payment details page.
  2. Click Refund.
  3. Enter the amount you want to refund and click Refund.

Voiding an uncaptured payment​

A void cancels an authorization that has not yet been captured. It releases the reserved funds without charging the customer and does not incur a refund fee.

To void a payment, send POST /payments/{id}/reverse with an empty body, exactly as you would for a full refund. ODUS automatically issues a void instead of a refund when the payment has not been captured (isCaptured: false).

Void — request body
{}
warning

You cannot void a payment after it has been captured. Once isCaptured is true, only a refund is possible.

Recording an external refund​

If you have already processed a refund directly at the gateway — outside of ODUS — you can record it in ODUS without sending a new refund request by setting isExternal: true.

External refund — request body
{
  "amount": 1500,
  "isExternal": true
}

ODUS will update the payment record and the reversal amounts, but will not contact the gateway. Omit amount to record a full external refund.

Response​

The response is the full Payment object. After a reversal, check amountReversed for the total reversed amount, isReversed to confirm at least one reversal was applied, and isFullyReversed to check whether further refunds are possible. See the POST /payments/{id}/reverse reference for the full response schema.

Constraints​

  • The amount must not exceed amountCaptured - amountReversed. Attempting to refund more than the remaining capturable amount will return a 400 error.
  • A void is only possible when isCaptured is false. Sending a reverse request on a captured payment always triggers a refund.
  • isExternal: true can be combined with a partial amount. It follows the same amount constraints as a regular refund.