Pennsylvania foreclosure is primarily:

Non-judicial foreclosure does not require court approval and is not Pennsylvania's primary method. This option represents a common misconception, as many states (like California) allow non-judicial foreclosure, but Pennsylvania specifically requires judicial proceedings.

Strict foreclosure is not used in Pennsylvania. This process allows the lender to take title to the property without a sale if the borrower defaults, but it's primarily found in a few eastern states and not Pennsylvania's foreclosure system.

Power of sale is a non-judicial process authorized by deed of trust rather than mortgage, which Pennsylvania does not use. This option confuses mortgage states (like PA) with deed of trust states that allow power of sale foreclosure.