To whom it may concern:
I am handing my son's admission letter to the school in person. Therefore, I have few questions below; can you help me to answer them, thank you!!!
1. Do I need to write sender's and recepient's address?
2. My wife and I write the letter together, so at the end do I write Mr. & Mrs. Anna Lee or Mr. & Mrs. Peter Lee?
3. Do I use semi-colon or a coma when I write Dear Ms. Smith{:} {,}
4.Which one is the right format to write the admission letter?
Sender address Date DateDate Recepient address Dear Ms.SmithRecepient address OR Dear Ms. Smith ORDear Ms. SmithThank you for your time to solve my problems!

Best Wishes,
Peter