1, the unit certification letter should be translated in Spanish or Spanish, and its signature and seal have been notarized by a notary and certified by the corresponding foreign affairs office of the province;
2. The qualification certification materials of the unit (business license of enterprise legal person or business license of organization code certificate examined by the company) shall be translated into Spanish or Spanish, and its signature and seal shall be notarized by a notary and certified by the foreign affairs office of the corresponding province. If it is a document certified by the Foreign Affairs Office of other provinces, it must be certified by the Argentine consulate in the country.
3. The invitation letter issued by Argentina requires that the signature must be authenticated by notaries and notaries' associations (the signer must be authorized by RENURE, the Argentine Immigration Bureau).
The birth certificate and the certificate of no criminal record you mentioned don't need double authentication!