The Presidents' power of pardon is provided for in Article II, Section 2 of the US Constitution.
pardon is the word you are looking for. Ford issued a presidential pardon for Nixon.
Richard Nixon received a Presidential Pardon from Gerald R. Ford.
His very first was to pardon Nixon for his crimes while president.
Nixon was never acquitted, however, he received a Presidential pardon from his successor, Gerald Ford.
Gerald Ford pardoned his predecessor who had resigned in a cloud of suspicion and that pardon hurt Ford in the 1976 election.
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Requirements to get a Presidential Pardon
A pardon for crimes against the government is known as amnesty.
The US President cannot pardon someone convicted of crimes other than federal crimes, he cannot pardon someone who has been impeached (and tried, and convicted), and he cannot pardon himself. He also cannot pardon someone for crimes not yet committed. However, there is no requirement that someone actually be convicted, so a Presidential pardon can effectively block any prosecution.
The last president to give a presidential pardon was Donald Trump.
A presidential pardon is a forgiveness of a crime and the repealing of a punishment that is made by the president.
Amnesty