Deception (Cha)
Deception Untrained Actions
Create a Diversion [one-action]
Attempt a single Deception check and compare it to the Perception DCs of the creatures whose attention you're trying to divert. Whether or not you succeed, creatures you attempt to divert gain a +4 circumstance bonus to their Perception DCs against your attempts to Create a Diversion for 1 minute.
Impersonate
In most cases, creatures have a chance to detect your deception only if they use the Seek action to attempt Perception checks against your Deception DC. If you attempt to directly interact with someone while disguised, the GM rolls a secret Deception check for you against that creature's Perception DC instead.
If you're disguised as a specific individual, the GM might give creatures you interact with a circumstance bonus based on how well they know the person you're imitating, or the GM might roll a secret Deception check even if you aren't directly interacting with others.
Lie
At the GM's discretion, if a creature initially believes your lie, it might attempt a Perception check later to Sense Motive against your Deception DC to realize it's a lie. This usually happens if the creature discovers enough evidence to counter your statements.