The Illinois Financial Affidavit is a legal form that is used in family law cases, mainly for cases involving divorce, legal separation, and support. It is a document in which each party to the case must provide a detailed financial disclosure of their assets, income, and expenses. This document is used to determine the financial capabilities of each party, which can then be used to determine an appropriate amount of spousal support and/or child support. There are two types of Illinois Financial Affidavits: Short Form and Long Form. The Short Form is typically used for cases involving an agreement on the amount of support, while the Long Form is used for more complicated cases, such as those involving significant assets or large income differences. Both forms require a detailed disclosure of income, assets, and expenses, including tax returns and other financial records.