Why is madam written as ma'am and can we write and say madam?

Madam with a d is more British English 'excuse me madam' very polite ma'am is more American English they would say that in America we wouldn't use that in British English

What do you think about this explanation??
Ajarn Ken Learn English

Ajarn Ken is a native English speaker from Scotland in the UK and has been teaching English since the year 2008. Most recently Ken has been teaching, coaching and mentoring university graduates in Bangkok, Thailand to prepare them to successfully pass interviews to be Cabin Crew and Flight Attendants with airlines all over the world

Ajarn Ken

No Internet Connection