Harris & Witherspoon
This is a Canadian sweepstake, posted in bulk from Singapore.
The letter claims that you are a cash claim recipient. You are requested to return the cash claim form within 10 days.
Conditions on the reverse of the letter suddenly explain that this is a sweepstake competition with confusing rules and requirements.
There are apparently two prizes of US$10,000 or ten annual payments of US$1,138.71 each, plus three prizes of US$2,500, and then all entrants receive US$1.00.
“As a special bonus, you may also request a stunning Enamelled Gold Heart Pendant set with a genuine hand-cut and polished .50 pt Diamond on a 18-inch chain." The cost is $29.95.
The cash claim and the extra bonus cannot be sent to you until they receive the form (and the money).
The intent of this scam is to sell you over-priced jewellery. We have not heard of anyone winning a sweepstake.