https://www.formsofaddress.info/vice-president-us-former/
Traditionally being vice president is a one-person-at-a-time office and former officials don’t continue to be so addressed when they leave office.
Some former office holders insist upon being addressed as Vice President (Name) in their post-office private endeavors. Most of the time it doesn’t create confusion and it strokes their ego, but at an official event one should avoid addressing a former vice president as Vice President (Name)...
Salutation:
Albert Gore would formally go back to his highest former honorific … Dear Senator (Surname):
[emphasis mine]
Thus: "Senator Biden."
(And, Gore has indeed used the title "Senator" after leaving office. Whether he's still doing so, or using "Vice President" to stroke his ego, is unknown to me.)
https://www.formsofaddress.info/vice-president-us-former/
Traditionally being vice president is a one-person-at-a-time office and former officials don’t continue to be so addressed when they leave office.
Some former office holders insist upon being addressed as Vice President (Name) in their post-office private endeavors. Most of the time it doesn’t create confusion and it strokes their ego, but at an official event one should avoid addressing a former vice president as Vice President (Name) — especially when the current office holder is present.
Salutation:
Albert Gore would formally go back to his highest former honorific … Dear Senator (Surname):
[emphasis mine]
Thus: "Senator Biden."
(And, Gore has indeed used the title "Senator" after leaving office. Whether he's still doing so, or using "Vice President" to stroke his ego, is unknown to me.)
https://www.formsofaddress.info/vice-president-us-former/
Traditionally being vice president is a one-person-at-a-time office and former officials don’t continue to be so addressed when they leave office.
Some former office holders insist upon being addressed as Vice President (Name) in their post-office private endeavors. Most of the time it doesn’t create confusion and it strokes their ego, but at an official event one should avoid addressing a former vice president as Vice President (Name) — especially when the current office holder is present.
Salutation:
Albert Gore would formally go back to his highest former honorific … Dear Senator (Surname):
[emphasis mine]
Thus: "Senator Biden."
(And, Gore has indeed used the title "Senator" after leaving office. Whether he's still doing so, or using "Vice President" to stroke his ego, is unknown to me.)
https://www.formsofaddress.info/vice-president-us-former/
Traditionally being vice president is a one-person-at-a-time office and former officials don’t continue to be so addressed when they leave office.
Some former office holders insist upon being addressed as Vice President (Name) in their post-office private endeavors. Most of the time it doesn’t create confusion and it strokes their ego, but at an official event one should avoid addressing a former vice president as Vice President (Name) — especially when the current office holder is present.
Salutation:
Albert Gore would formally go back to his highest former honorific … Dear Senator (Surname):
[emphasis mine]
Thus: "Senator Biden."