This method is used by the seller to update an existing evidence set for a payment dispute with one or more evidence files. The unique identifier of the payment dispute is passed in as a path parameter, and unique identifiers for payment disputes can be retrieved with the <strong>getPaymentDisputeSummaries</strong> method.<br><br><span class="tablenote"><strong>Note:</strong> All evidence files should be uploaded using <strong>addEvidence</strong> and <strong>updateEvidence</strong> before the seller decides to contest the payment dispute. Once the seller has officially contested the dispute (using <strong>contestPaymentDispute</strong> or through My eBay), the <strong>addEvidence</strong> and <strong>updateEvidence</strong> methods can no longer be used. In the <strong>evidenceRequests</strong> array of the <strong>getPaymentDispute</strong> response, eBay prompts the seller with the type of evidence file(s) that will be needed to contest the payment dispute.</span><br><br>The unique identifier of the evidence set to update is specified through the <strong>evidenceId</strong> field, and the file(s) to add are identified through the <strong>files</strong> array in the request payload. The unique identifier for an evidence file is automatically generated and returned in the <strong>fileId</strong> field of the <strong>uploadEvidence</strong> response payload upon a successful call. Sellers must make sure to capture the <strong>fileId</strong> value for each evidence file that is uploaded with the <strong>uploadEvidence</strong> method.<br><br>The type of evidence being added should be specified in the <strong>evidenceType</strong> field. All files being added (if more than one) should correspond to this evidence type.<br><br>Upon a successful call, an http status code of <code>204 Success</code> is returned. There is no response payload unless an error occurs. To verify that a new file is a part of the evidence set, the seller can use the <strong>fetchEvidenceContent</strong> method, passing in the proper <strong>evidenceId</strong> and <strong>fileId</strong> values.

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}

This method is used by the seller to update an existing evidence set for a payment dispute with one or more evidence files. The unique identifier of the payment dispute is passed in as a path parameter, and unique identifiers for payment disputes can be retrieved with the <strong>getPaymentDisputeSummaries</strong> method.<br><br><span class="tablenote"><strong>Note:</strong> All evidence files should be uploaded using <strong>addEvidence</strong> and <strong>updateEvidence</strong> before the seller decides to contest the payment dispute. Once the seller has officially contested the dispute (using <strong>contestPaymentDispute</strong> or through My eBay), the <strong>addEvidence</strong> and <strong>updateEvidence</strong> methods can no longer be used. In the <strong>evidenceRequests</strong> array of the <strong>getPaymentDispute</strong> response, eBay prompts the seller with the type of evidence file(s) that will be needed to contest the payment dispute.</span><br><br>The unique identifier of the evidence set to update is specified through the <strong>evidenceId</strong> field, and the file(s) to add are identified through the <strong>files</strong> array in the request payload. The unique identifier for an evidence file is automatically generated and returned in the <strong>fileId</strong> field of the <strong>uploadEvidence</strong> response payload upon a successful call. Sellers must make sure to capture the <strong>fileId</strong> value for each evidence file that is uploaded with the <strong>uploadEvidence</strong> method.<br><br>The type of evidence being added should be specified in the <strong>evidenceType</strong> field. All files being added (if more than one) should correspond to this evidence type.<br><br>Upon a successful call, an http status code of <code>204 Success</code> is returned. There is no response payload unless an error occurs. To verify that a new file is a part of the evidence set, the seller can use the <strong>fetchEvidenceContent</strong> method, passing in the proper <strong>evidenceId</strong> and <strong>fileId</strong> values.

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}