Separate bookkeeping functions. Misapplication of payments can lead to embezzlement. Do not let the same person who processes checks also manage the accounts receivable records. Personally approve bookkeeping adjustments . Approve any adjustments to the books no matter how slight even adjustments to correct an error.
Control check signers .
Limit the number of signatories to yourself and one or two highly trusted assistants. Keep blank checks under lock and key. Review monthly bank statements . Instruct your bank to send the monthly statement directly to you. Review the statement before passing it on to your bookkeeper.