I've been put on a debtors' register
They can only include you for certain, due and payable debts that you are not disputing, and they must have warned you.
Which debts
Certain, due and payable, and not challenged by you through administrative or court proceedings.
«b) Que los datos se refieran a deudas ciertas, vencidas y exigibles, cuya existencia o cuantía no hubiese sido objeto de reclamación administrativa o judicial por el deudor»
They must warn you
The creditor must have told you that you could be included.
«c) Que el acreedor haya informado al afectado en el contrato o en el momento de requerir el pago acerca de la posibilidad de inclusión en dichos sistemas»
Is something different in your case?
Tell us in your own words and we will tell you what applies to you, with the law in hand.
General information, not advice on your specific case. Text prepared with the help of artificial intelligence; every quotation is a verbatim extract from the official text and is checked against the BOE every night. Other common letters.