Can I Say Dear Your Excellency?

The correct format is “Dear (Mr. or Madam) Ambassador” for an American ambassador and “Your Excellency” for a foreign ambassador.

How do you address a letter to Excellency?

Use of His/Her/Your Excellency

Others address an official as 'Your Excellency' in conversation or a salutation, or 'His/Her Excellency (Full Name)' in writing. The officeholder never uses Excellency as part of his/her own name.

Can you say dear ambassador?

Note: When addressed by a Canadian citizen, whether in Canada or abroad, the form used is simply Ambassador or High Commissioner. The title "Excellency" is only used by the government and the citizens of the country to which the person is accredited.