# What Is Proof of Service? <!-- current-jcc-catalog-start --> ## Current official catalog downloads Official catalog checked: 2026-10-28. Listed effective date: **January 1, 2021**. [Official form information](https://selfhelp.courts.ca.gov/jcc-form/APP-109-INFO). Each translation is the version currently linked by the court and may show a different revision date. ### English [[Files/FormFiles/APP-109-INFO.pdf|Open APP-109-INFO — English PDF]] ![[Files/FormFiles/APP-109-INFO.pdf]] <!-- current-jcc-catalog-end -->