In original and copy, personally (not accepted by fax, email or post). It is presented by the interested taxpayer, or his representative, who must show the official document. The documents to present are: • Names and surnames if you are a natural person • Name or business name if you are a legal entity • Tax Identification Number (NIT) • Address of the fiscal domicile • Clear and detailed statement of the facts and grounds of the claim and what is intended with the appeal. • If it is a Remedy Appeal for a partially paid tax debt, copies of the vouchers of the contribution that will be compared with the original will be recorded and attached.