In a apparently genuine email, Sony has just refunded me $2.82 in taxes it erroneously charged me.
Dear Sony Entertainment Network account holder,
After performing routine system maintenance, Sony Entertainment Network sales tax records were mistakenly modified and some customer’s accounts were charged sales tax in error.
Between November 18, 2010, and April 11, 2011, one or more transactions originating from your account was charged sales tax in error. Correcting this, we will refund the errant charges back to your account in the amount of $2.82 via your Sony Entertainment Network wallet. This will appear in your transaction history as a one-time inclusive credit.
We are diligently working to correct this error and will have your account refunded by May 7, 2012. If you do not see the credit to your account by May 7, 2012, or if you have further questions please contact our customer service department at: http://us.playstation.com/support/contact_options/
The Sony Entertainment Network Team
Unexpected credit is always welcome.