Section 4--109. Process of Posting

The "process of posting" means the usual procedure followed by a payor
  bank  in  determining  to  pay  an  item  and  in  recording the payment
  including one or more of the following or other steps as  determined  by
  the bank:
    (a) verification of any signature;
    (b) ascertaining that sufficient funds are available;
    (c) affixing a "paid" or other stamp;
    (d) entering a charge or entry to a customer's account;
    (e)  correcting or reversing an entry or erroneous action with respect
  to the item.