What are the patches required for Service Contracts module ?
In general point of view , there were multiple ways to find the relevant patch sets for your environment.
Please refer to the following Doc :
Oracle Service Contracts Release Update Pack 4 for 12.1 Readme (Doc ID 1952287.1)
Refer below MOS as well , Just in case if you haven't able find the required information.How to Find E-Business Suite Recommended Patches (Doc ID 1400757.1)Hope above information help you. At the last sort you can contact support for specific patch updates for your environment.