You may want to rescind power when:
You can act for yourself and no longer need a representative
The event or activity that called for a POA is over (e.g., you were away on business but have now returned)
The attorney-in-fact can no longer act (e.g., they’re moving or have passed away)
The attorney-in-fact is not fit to act (e.g., you’ve decided they’re untrustworthy or irresponsible)
You wish to appoint someone else
Keep in mind that state governments have different laws about revoking a POA. In Alabama, for example, a Durable POA is automatically revoked if your spouse is your attorney-in-fact and you divorce.
Remember to check your state laws if you’re thinking about canceling your Power of Attorney.