Another thing that can be helpful for older kids (who already know that lying is bad, but are still doing it) is to immediately engage them in a positive task. Something that helps them to feel useful, purposeful, and helpful --- like helping you unload the dishwasher or pick out a recipe to make for dinner tonight. Then, you can have a discussion afterward when the child has come back into balance and explore why they felt compelled to lie in that moment.
Another thing that can be helpful for older kids (who already know that lying is bad, but are still doing it) is to immediately engage them in a positive task. Something that helps them to feel useful, purposeful, and helpful --- like helping you unload the dishwasher or pick out a recipe to make for dinner tonight. Then, you can have a discussion afterward when the child has come back into balance and explore why they felt compelled to lie in that moment.