For Geographic number Types in El Salvador
Valid LoA (Local address mandatory).
Copy of Identification (DUI) or Passport of the Authorized Person.
Copy of the latest invoice plus, proof of payment of that invoice.
Company registration certificate (only if the numbers belong to a company).
Power of Attorney (only if the numbers belong to a company).
Contact email@example.com for the LoA template for number porting in El Salvador.