Thanks for this. This is the best explanation in English of the process. The only discrepancy that may exist between this page and the Peruvian Migraciones page on this (https://www.gob.pe/12881-solicitud-de-visa-para-residentes-segun-su-calidad-migratoria-visa-para-residente-por-formacion?token=PN04T50np9abRy8rc6Uvns2ytQv2AlZ3gBlutLXAUoM) is the following:
"For exchange students: Official letter from the foreign university or higher education institution" which I believe comes from this on the Migraciones page:
"En caso de intercambio estudiantil: Copia simple de la carta de acreditación de la universidad o institución educativa, reconocida por el Estado peruano, que recibe al beneficiario, indicando los nombres y apellidos y el tiempo de duración de estudio igual o superior a un (1) año."
My interpretation of this originally was that you need the document from the RECEIVING university in Peru, not the foreign university. I doubted myself once I read this page, and asked my Peruvian university contact. She confirmed that even exchange students only need the paperwork from the host university (in Peru). Again, I will confirm this when I am finished with the process, as I'm diving into it now.
Thank you!
Sebastián