In the USSR, people convicted of treason were routinely stripped of their State decorations, even when they were honestly earned before the treason (e.g., Власов, Добробабин, Берия). The sentence also routinely included a confiscation of all personal property of such convicts.
What about other countries?
(The rest of people in List of Allied traitors during World War 2 do not appear to have been decorated before their treason).
I am specifically interested in the Western countries of the 20th century, but I do not want to restrict the question to military decorations or military treasons. I am interested in the concept "this crime wipes out all previous merits".