FlexCard purchases are no different from other expenditures that post to the General Ledger: all financial transactions should be reconciled each month.
In the case of FlexCard purchases, the initial reconciliation is made at the time that the charge was approved and allocated by the Reviewer. The General Ledger review consists of verifying that the charge has hit the General Ledger in the expected amount, under the expected LAFSO. Any errors must be corrected via processing of a TOE or financial journal.