Here's one I got, masquerading as a latter from the USPS that is so official that it uses "to the tune of":
UNITED STATES * POSTAL INSPECTION SERVICE
PO BOX 555, NEW YORK NY 10116-0555
This is to notify you that we have intercepted your parcel from DHL COURIER SERVICE is making the delivery and we have stopped the delivery process for some security reasons stated below:
Our scanning system has detected that your parcel contains a confirmable CARD to the tune of US$1,500,000.00 USD.
Also for the Delivery of the Parcel to continue, you are in obligation to obtain from Spain, a Duly Sworn Affidavit from Spanish High Court which will back up the Origin of Fund. This is in line with the Anti-Terrorist Campaign which the USA Government has embarked on recently to protect our Territory from future attacks. You should therefore contact the sender of the CARD or the dhl Courier Agent in Madrid Spain to get the Sworn Affidavit for you while we wait to receive from you the Affidavit File Number to enable us forward your CARD to your address.
Below is his contact information. Note that the cost of the Affidavit is US$158 and do not hesitate to remit the amount to him.
Name: Juan Guillermo
Tel:0034 634 126 539
We shall then forward the CARD to you and you will be sure of a genuine CARD that is coming to you. We are doing this for your interest considering the rate which fraudulent and stolen checks/CARD are been sent to our innocent citizen that most times put them in problem. Always send your correspondence to our secure email: email@example.com
Your urgent action on this notice will be appreciated.
Chief Postal Inspector