posted: Aug. 19, 2008 @ 9:35a
In all the years I've kept track of my accounts separately, I've frequently found transactions that posted for more than I authorized (most common are the transactions that allow a tip to be added, but there are plenty of threads discussing the circumstances of that scenario). On a couple occasions I've caught scenarios where the bank made a mistake, but those are the easiest to spot even without a separate record (double charge, erroneous fee, unpaid interest are the three I've encountered)
Without the reconciliation of your receipts, you are at the mercy of your memory for verifying all charges are authorized and of the correct amount. I don't know about you guys, but my memory is not picture perfect. Like most people, scanning a statement using only memory is only going to spot transactions for a store that you either would not shop at, or have not shopped at in ages.
If you don't want to keep a separate record of your account, then do what I do now which is to save all receipts, then when the statement comes, mark off each transaction for which you have a matching receipt. Then you will have about a handful of oddball transactions left (online purchase, lost receipt, etc...) Then make an educated guess on whether to dispute those or not. When you are done, file the receipts that support a warranty or potential return and shred the rest. For 15 to 30 minutes a month (depending on your volume), you gain piece of mind. The nice thing about finding transactions that don't match the amount you authorized, you tend to get the full transaction amount refunded, not just the difference.