When balancing your accounts at the end of a month/period or year there are a few different checks that should be made.
Check the aged creditors report back against the trial balance report or profit & loss/balance sheet report check that the nominal Purchase Ledger- Office and Purchase Ledger-Nominal balance to the report figure for each section.
Check the aged debtor reports balance back to the office/business balance breakdown report which shows the o/s bills value separated down from the disbursements. Also check back the aged disbursements/bills report to the trial balance figure for the nominal Client Ledger (Office Side) this then can be checked against the Office Balance Breakdown report to check that these values are showing correctly on the matters.
Run the matter listing reports to check the client balance against the client bank nominal on the trial balance report, then check that the bank reconciliation value after taking away all unpresented transactions balances back to the same figure. This is the three way check that needs doing for any client bank reconciliations.
For the office bank reconciliation you can just check the trial balance report against the value after unpresented transactions is the same as the office bank nominal, this should be done for all bank accounts.