As a buyer, your point of contact will be your Realtor, attorney, or the seller. The seller's bank will not discuss the terms of sale w/ you - - whether this is a short sale or not.
If it is a short sale, the lender has to approve the terms of sale and price negotiated by the buyer and seller. You did not indicate this was a short sale. If this is not a short sale, the lender is not involved at all, unless or until the lender takes possession upon completion of the foreclosure action.
Do you know that the owner wants to sell this property? There are times when a buyer sees a "foreclosure" listed on a website and assumes the property is for sale. Has the owner advertiesed or communicated to you that he/she wants to sell? Or, is it listed through a Realtor?
If it is listed w/ a Realtor, hire your own buyer agent and have your agent contact the listing agent.