Innocent-Spouse Rule

A corollary to the Did-You-Eat-The-Last-Cookie Rule, and a subhead under the Don't-Watch-Game-of-Thrones-Without-Me Directive.

Also, a rule dealing with taxes.

You let your spouse do the taxes for both of you. Unfortunately, as much as you love them, your honey bear just isn't very good at math. Eventually, your returns get audited and the IRS levies a penalty.

The Innocent-Spouse Rule states that you can seek relief from the penalty incurred by your spouse's error under certain circumstances. For instance, you need to show that you weren't aware of the error in the tax return. Also, the IRS has to agree that relief is warranted on your part.