Legal Question in Banking Law in Pennsylvania

The specifics of it may vary based on where the judgment was obtained, but generally speaking, you will need to take discovery in aid of execution. That would be issuing interrogatories or requests for production of documents, or possibly issuing notices of depositions or subpoenas to people who would have the information about location of defendants' assets subject to execution (such as the bank accounts).

Take a look at the Pennsylvania rules of civil procedure section that allows for discovery in aid of execution: http://www.pacode.com/secure/data/231/chapter3000/s3117.html

There may be specific facts, such as what type of matter it is, or whether this is a foreign judgment, etc. that could change this answer and what you do next significantly, but if you have a judgment, I would proceed with discovery in aid of execution next. I hope this helps.