I offer service of process. I deliver court documents to establish jurisdiction. In other words, if you are being sued, I will be bringing the papers to you.
I also file those papers at the court house with the clerk, and then find the person that is being served (skip trace).
I also post notices for landlord tenant matters, i.e. 3-day notice to pay or quit, cure covenant or quit, etc.
I also do evictions from 3-day to lockout, and if needed, I can even change the locks in most cases.