Short answers, pulled from the story.
The Atlantic Charter was issued on the 14th of August 1941 at Naval Base Argentia in Placentia Bay, Newfoundland. There was no formal signed document; the final agreed text was telegraphed to London and Washington. Roosevelt later stated, "There isn't any copy of the Atlantic Charter, so far as I know."
US president Franklin D. Roosevelt and British prime minister Winston Churchill produced the Atlantic Charter during the Atlantic Conference in August 1941. The name itself was coined by the Labour Party newspaper the Daily Herald, and Churchill adopted it in Parliament on the 24th of August 1941.
The eight clauses covered no territorial gains by the US or UK, territorial changes only with consent of affected peoples, the right to self-determination, lower trade barriers, global economic cooperation and social welfare, freedom from want and fear, freedom of the seas, and disarmament of aggressor nations followed by common postwar disarmament.
The charter's adherents signed the Declaration by United Nations on the 1st of January 1942, which became the basis for the modern United Nations. The Inter-Allied Council, including governments-in-exile of Belgium, Czechoslovakia, Greece, Luxembourg, the Netherlands, Norway, Poland, and Yugoslavia, endorsed its principles on the 24th of September 1941.
Churchill declared in September 1941 that the charter applied only to states under German occupation, not to British colonial territories. Gandhi wrote to Roosevelt in 1942 that Allied claims to fight for freedom sounded hollow as long as Britain exploited India and Africa. Churchill stated explicitly he had not become Prime Minister to administer the liquidation of the British Empire.
On the 10th of June 2021, US president Joe Biden and UK prime minister Boris Johnson signed the New Atlantic Charter in Cornwall, England, at their first meeting. The White House described it as aimed at meeting the new challenges of the 21st century while building on the commitments set out eighty years earlier.