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NO_IOU_HEADER

Message. Missing x-tollgate-iou header

Hint. Include a signed IOU in the x-tollgate-iou request header.

Wire shape

{
  "error": {
    "code": "NO_IOU_HEADER",
    "message": "Missing x-tollgate-iou header",
    "hint": "Include a signed IOU in the x-tollgate-iou request header.",
    "docsUrl": "https://docs.tollgatepay.com/errors/no-iou-header"
  }
}

Canonical URL

https://docs.tollgatepay.com/errors/no-iou-header — this URL is hard-coded into the 402/403/451 docsUrl field. It is stable; renaming the slug requires a migration plan.

Related codes