Here is the letter I was told to send the to the Assistant Commissioner of Customs Air Cargo Complier, Bangalore:

Dear Sir:

Reference above mentioned AWB. I have received a package containing personal gifts from Daniel Burnham; Arlington, TX, USA.

Since I do not possess IEC code, request your good self kindly allow me to file the paper under Dummy IEC code.

Obviously I did not come up with this on my own.