Mr. X's chart is open. Assistant walks in and says she needs an order for Mrs. Y's CT scan. I right click on Mrs. Y's name on the patient's list and click 'Print orders/Requisition slip' and order the CT, print/fax and close. The order now gets deposited in Plan section of Mr. X's open chart. PANIC!!! Look in messages, no messages recording the transaction. Call hospital to see if the order was sent on Mrs. Y and not Mr. X. Hospital confirms that the order is for Mrs. Y. I have no record of ordering the CT on Mrs. Y.