REGIME_KEY_NOT_SUPPORTED

Regime key ‹value› is not available. Keys 06 and 14 require data the invoice does not carry (06, the cost-based taxable base; 14, an operation date after the issue date and a public-administration recipient). Key 03 requires the invoice not to show the tax separately (RD 1619/2012, art. 16.2.c), and the invoice always does. Use the key that fits the operation

Category: Invoices


HTTP status	`422` Unprocessable Content
Retry	After fixing the cause

When it happens

A line, or the default of the tax configuration, carries regime_key 03, 06 or 14. Under 03 the invoice must not show the tax separately, and a BeeL. invoice always does; with 06 and 14 AEAT requires data the invoice does not carry.

How to fix it

Use another regime key. A corrective invoice of an original that already carried one of these keys keeps it.

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.

Rules that cite this code

TAX-016 Regime keys 03, 06 and 14 are not accepted

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/REGIME_KEY_NOT_SUPPORTED",
  "title": "REGIME_KEY_NOT_SUPPORTED",
  "detail": "Regime key ‹value› is not available. Keys 06 and 14 require data the invoice does not carry (06, the cost-based taxable base; 14, an operation date after the issue date and a public-administration recipient). Key 03 requires the invoice not to show the tax separately (RD 1619/2012, art. 16.2.c), and the invoice always does. Use the key that fits the operation",
  "instance": "/v1/<resource>",
  "errors": [],
  "success": false,
  "error": {
    "code": "REGIME_KEY_NOT_SUPPORTED",
    "message": "Regime key ‹value› is not available. Keys 06 and 14 require data the invoice does not carry (06, the cost-based taxable base; 14, an operation date after the issue date and a public-administration recipient). Key 03 requires the invoice not to show the tax separately (RD 1619/2012, art. 16.2.c), and the invoice always does. Use the key that fits the operation",
    "details": {}
  },
  "meta": {
    "timestamp": "2026-05-21T10:00:00Z",
    "request_id": "4bf92f3577b34da6a3ce929d0e0e4736"
  }
}

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

Message

La clave de régimen ‹value› no está disponible. La 06 y la 14 exigen datos que la factura no lleva (la 06, la base imponible a coste; la 14, una fecha de operación posterior a la de expedición y un destinatario Administración Pública). La 03 exige que la cuota no figure por separado en la factura (RD 1619/2012, art. 16.2.c), y la factura siempre la desglosa. Usa la clave que corresponda a la operación

La clau de règim ‹value› no està disponible. La 06 i la 14 exigeixen dades que la factura no porta (la 06, la base imposable a cost; la 14, una data d'operació posterior a la d'expedició i un destinatari Administració Pública). La 03 exigeix que la quota no figuri per separat a la factura (RD 1619/2012, art. 16.2.c), i la factura sempre la desglossa. Fes servir la clau que correspongui a l'operació

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.

Other errors in this category

ATTACH_SOURCE_INVOICE_UNAVAILABLE

A source invoice is not available (it does not exist or you no longer have access); uncheck the source invoices attachment to send without the folder

ATTACH_SOURCE_INVOICES_NO_SOURCES

The invoice has no consolidation disbursements: there are no source invoices to attach

ATTACH_SOURCE_INVOICES_REQUIRES_PDF

Attaching the source invoices also requires attaching the invoice PDF

ATTACH_SOURCE_PDF_MISSING

These source invoices have no generated PDF: ‹value›

ATTACH_SOURCE_ZIP_TOO_LARGE

The source invoices ZIP (‹value› MB) exceeds the maximum sendable size (‹value› MB)

Keep exploring

All Invoices errors

Every code in this category in one table.

Error reference home

Browse every category or jump to the handling guide.

REGIME_KEY_CLASSIFICATION_NOT_ACCEPTED

Regime key ‹value› does not accept a line with exemption_reason ‹value›: with that key AEAT only accepts exemption_reason ‹value›

REGIME_KEY_REQUIRES_RECIPIENT_NIF

With regime key ‹value› the recipient must be identified by NIF: AEAT does not accept an alternative identifier