Typical Process When Making Offer

[Kristin Denne]

Newbie here! All help welcome!

I am trying to make my first offer on a single family foreclosure. I am going through a realtor. After placing my offer as cash, the realtor is now saying that I'm going to need to "sign some papers", give proof of funds (letter from bank), and a hard money check for X number of dollars. Is this typical? Like I said, this is my first time placing an offer on a foreclosure and would be my first investment property. 

The foreclosure is in Pennsylvania if that makes a difference.