How To Write A Letter Of Introduction For Visa Application . State company guarantee of financial responsibility for all travel expenses incurred by applicant. Write this type of letter when you are communicating information about a visa application. 22 Letter of Introduction Template RedlineSP from www.redlinesp.net [passport number] dear sir/madam, my name is [name of host], and my place of residence is at [address of host], united states. The visa application requirements are different in every embassy, so the introduction letter rules can also vary from each other. Respected sir/madam, i, [inviting person’s name] currently residing at [inviting person’s address], and a citizen/permanent citizen of [country’s name], am writing this letter to support the visa application of my friend, [applicant’s name].