I also turned off overdraft on my account, but I did this when I got my Wachovia debit card in the mail. It has as a $5000 per DAY limit of transactions. I called to get it lowered, to say $500 but they couldn't do it on my blue debit card. Since $5k was more than my checking account at the time I turned off overdraft so someone couldn't drain my savings account along with it.