Who Can Issue a Visa Letter of Invitation?

The letter itself is considered an official document that is an invitation from a close friend, relative, or educational system within the country that is a recognized establishment or permanent resident of the country the tourist wants to visit.

The person who has issued the invitation is effectively taking responsibility for the foreigner during their visit. He must:

    Includes information about how the visitor will be taken care of financially during their stay.
    The writer of the letter must be someone who can guarantee their personal relationship with the applicant and can express the purpose (usually for visiting family, friends, and touring the country) of the visit. 
    The writer of the letter must list his or her residency and legal status within the country, to act as a witness.