SERIES_INCOMPATIBLE_DOC_TYPE

When it happens

The series and the invoice's type do not match: a series numbers only documents of its own type. The series_id you sent belongs to a series of another document type, for example a proforma series for a standard invoice or a standard series for a corrective one, or it is an UNASSIGNED series, which numbers no type; or a draft whose type or series_id changed no longer fits. error.details.expected_document_type says which type was needed. It is checked when the invoice is created or edited, again when a draft is issued, and when a recurring invoice template changes its invoice_type or series_id.

How to fix it

Send the id of a series of the right type, or omit series_id to use the company's default series for that type. To keep using an UNASSIGNED series, give it a type.

Retry

Not as is: the same request fails the same way. Fix the cause described above, then send the request again, under a new Idempotency-Key if the body changed.

Returned by

The operations where this code is most likely. The list is not exhaustive.

• POST /v1/companies/{company_id}/invoices
• POST /v1/companies/{company_id}/invoices/{invoice_id}/corrective
• PATCH /v1/companies/{company_id}/invoices/{invoice_id}
• POST /v1/companies/{company_id}/invoices/{invoice_id}/issue
• PATCH /v1/companies/{company_id}/recurring-invoices/{recurring_invoice_id}

Rules that cite this code

• NUM-005 Simplified invoices are numbered in their own series
• NUM-006 Corrective invoices are numbered in their own series

Example response

When this error occurs, the API answers 422 Unprocessable Content with a JSON body of this shape:

{
  "type": "https://docs.beel.es/errors/SERIES_INCOMPATIBLE_DOC_TYPE",
  "title": "SERIES_INCOMPATIBLE_DOC_TYPE",
  "detail": "Series '‹value›' does not accept documents of type ‹value›: each series numbers only its own type. Choose a series of that type.",
  "instance": "/v1/<resource>",
  "errors": [],
  "success": false,
  "error": {
    "code": "SERIES_INCOMPATIBLE_DOC_TYPE",
    "message": "Series '‹value›' does not accept documents of type ‹value›: each series numbers only its own type. Choose a series of that type.",
    "details": {}
  },
  "meta": {
    "timestamp": "2026-05-21T10:00:00Z",
    "request_id": "4bf92f3577b34da6a3ce929d0e0e4736"
  }
}

The type URI is stable and always resolves to this page.

Message

Send the request with Accept-Language: <es|en|ca> to receive the message in your preferred language.

Placeholders like ‹value› are filled in at runtime with the actual values of your request.

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