In Chile, B2B e-Invoicing is already mandatory for all taxpayers since 2018. E-Invoices are named Electronic Tax Documents (DTE) and before uploading DTE invoices, companies must be registered to the Chilean tax authorities (SII). The process is called accreditation and digital certificate of suppliers are required. In the process, the tax authority checks the issued document and transmission after that if the requirements are met, the SII registers them as issuers of DTEs. Electronic invoices must be digitally signed (Folio Authorization Code) which will be given after accreditation in XML format and stored 6 years in both sender and receiver.