Please state in which country your phrase tends to be used, what the phrase is, and what it should be.
Example:
In America, recently came across “back-petal”, instead of back-pedal. Also, still hearing “for all intensive purposes” instead of “for all intents and purposes”.
Just to clarify the exceptions to the general rule:
effect as a verb: to cause or bring about
This policy effects change.
affect as a noun: a display of emotion
She greeted us with warm affect.