What was the date that the June, 2011 HST rebate cheques were mailed?
I have my bank statement that covers up to June 17th and the HST cheque was not deposited by that time.
The Ontario Government mailed the June, 2011 HST cheques early, likely at the end of May or early June, in anticipation of rotating strikes by Canada Post workers.
However, the cheques were post-dated for June 10th.
If you didn't receive your rebate yet, this other answer points to contact information.