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  2. Electronic invoicing - Wikipedia

    en.wikipedia.org/wiki/Electronic_invoicing

    UML class diagram depicting a invoice. Electronic invoicing (also called e-invoicing or einvoicing) is a form of electronic billing.E-invoicing includes a number of different technologies and entry options and is usually used as an umbrella term to describe any method by which a document is electronically presented from one party to another, either for payment [1] or to present and monitor ...

  3. Superintendencia Nacional de Administración Tributaria

    en.wikipedia.org/wiki/Superintendencia_Nacional...

    Superintendencia Nacional de Aduanas y de Administración Tributaria, also known as SUNAT, is the organization which enforces customs and taxation in Peru. [1]