The Creggan born Stoke player, who turned 30 on April 22, received a card containing a stream of vitriolic and abusive comments about his nationality.
It also includes vile references to Bobby Sands, Hitler, Operation Flavius and Bloody Sunday.
McClean is a regular target of abuse for his proud stance in not wearing the poppy in November each year.
The dad-of-three has previously taken to social media to call for the Football Association to do more in attempting to prevent such behaviour.
He took to Twitter on Wednesday to reveal the latest abuse he has received, posting images of the vile words written on the card’s front, back and inside.
With the caption ‘No words needed’, phrases such as “Fenian sub human b*****d” and “Happy Birthday and die on April 22” can clearly visible.
Inside, the hatred escalates, with Bobby Sands referred to as the 1981 “Slimmer of the Year”.
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