I had an experience once with PayPal and Dell Canada.<p>I bought a couple of monitors off the website, and apparently there was an issue with the calculation of taxes (which wasn&#x27;t noticed) resulting in a pretty decent discount. Well, I paid for the monitors through PayPal and authorized a charge of ~$600. A few days later I check up on the status of my order and it states that I was charged ~$800 due to an &quot;Additional authorization&quot; charge. This was because Dell noticed their mistake and instead of communicating it to me, just decided to sneak it in there, which was only noticed by me after checking up on it, no notification was sent out about this.<p>So apparently, PayPal allows a company to charge a customer more than they have authorized a payment for, and don&#x27;t even bother to send a courtesy notification about this.<p>Buyer beware.