Absolutely check all of your accounts every single day. A couple of months ago one of my vendors told me she charged me the wrong amount for some supplies and would charge the additional. I went into my account to check and saw there were several charges on my Paypal business card for close to $1,000! After they checked it out, it was revealed that my card with my name and address was used to purchase computer equipment and ship it to an address in another state with nothing changed except that they added my last name to theirs! Paypal gave me a "provisional" refund, but I called the police in that town and filed a case. Once Paypal found out about it, the refund was permanent. How they got my info, I'll never know.