Question: is it madam or madame in a letter?
Answer: Madam (/ˈmædəm/), or madame (/ˈmædəm/ or /məˈdɑːm/), is a polite and formal form of address for women, often contracted to ma'am (pronounced /ˈmæm/ in American English and /ˈmɑːm/ in British English).