[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]:
We are pleased to announce the opening of Advanced Systems in Chicago, with our offices opening at 2125 South Boulevard on August 16 of this year. Partners Sue Hill, James Swanson, and Michael Collins look forward to serving both local and regional markets.
More news will be forthcoming as this exciting business venture unfolds. We are deeply grateful for your ongoing support.
[Sender's first and last names]