money received or held by a bank or savings association, or the credit given for money or its equivalent received or held by a bank or savings association, in the usual course of business for a special or specific purpose, regardless of the legal relationship thereby established, including without being limited to, escrow funds, funds held as security for an obligation due to the bank or savings association or others (including funds held as dealers reserves) or for securities loaned by the bank or savings association, funds deposited by a debtor to meet maturing obligations, funds deposited as advance payment on subscriptions to United States Government securities, funds held for distribution or purchase of securities, funds held to meet its acceptances or letters of credit, and withheld taxes: Provided , That there shall not be included funds which are received by the bank or savings association for immediate application to the reduction of an indebtedness to the receiving bank or savings association, or under condition that the receipt thereof immediately reduces or extinguishes such an indebtedness.