Three Liberal MPs have reportedly received anonymous death threats through their personal addresses.

WA Liberal MP and member for the North Metropolitan region Peter Katsambanis received one of the letters when checking the mailbox of his Hillarys home on Thursday morning.

The threatening letter send to several WA Liberal MPs.

The letter was typed on a slip of paper, and read:

"this is a warning to both you and your family, you stuffed up my life and my businessthrough your partys behaviour. so now everytime you hear a bang or you think someone is watching you, it will be us. women children we will get them [sic]."