This module is an effective control tool to know the real situation of cash and a valuable information for accounting in Odoo / OpenERP.
You can find an example of setting up at the following address: http://bit.ly/1sFXYGH
Once installed:
You will be able to reconcile transactions / bank accounts, in order to get bank accounts in more realistic account statements, i.e. to put the two accounts in agreement (bank account and account statement)
It is also possible to consult closely reconcilied lines on the Accounting Menu.
Obviously you can edit reconciliation reports.