[Your letterhead, if desired; if not, your return address]
[Date of letter-month, day, and year]
[Recipient's first and last names]
[Street or P.O. box address]
[City, State ZIP code]
Dear [recipient's name]:
I have been working in Baltimore, Maryland for the past six months and am writing to request a visa for my wife, Danielle Russo, to travel to Baltimore, preferably starting this August. Danielle currently resides in Rome, Italy, where she is a citizen. I will be responsible for Danielle's financial support and housing during the time she is in the United States. She also plans to seek employment in Baltimore.
Please let me know what the next steps would be and what additional information you need from me. I look forward to hearing from you soon, and thank you for considering this request.
[Sender's first and last names]