surprise

I was surprised to find a letter from the Singapore Press Holdings in my mail today.

It said, 'Pertama kali, terima kasih kami ucapkan atas kesudian sdri meluangkan masa menyertai sayembara anjuran kami. Karya penyertaan sdri kini sedang dinilaikan dan diadili oleh panel pengadil kami yang terdiri daripada tiga orang sasterawan mapan dan berwibawa.'

The thing is I never did send any entry to them.
I hope it's a mix-up or if it's really true that the entry is a valid one, I'd think someone send it on my behalf.
The bonus question is 'Who?'
The only clue I had is that someone knows my address very well. Spooky.