Television Advertisements.
Your question is close to mine LOL.
What is almost always a lie?
Political campaign speeches.
" This is a call from Windows tech support " nope it's not :)
People say that I'm ugly. Couldn't be further from the truth. Just look at this handsome face!!!!!
I'm adding to the popular answer here and saying political promises.
What always comes out of the mouth of a politician.
When I tell people my weight.
A completely honest person
Election promises.
Advertising.
Sales pitches.
Very often when a politician begins by asserting "As I've said many times before ...", you are going to hear them say something for the very first time ever.