Hello, One of my friends got his PR in 2012. He stayed in Toronto for a few months and had left to his home country. He came again in 2016 but he is sure he cannot meet the residency obligations before his PR expires. All these years he has submitted his and his wife's nil returns and got some amount credited to his account as HST credit. It is only credited for him and though he submitted his wife's nil returns, nothing given to her since she never worked in Canada. Will he have to pay back the credited HST when he no longer continues to be PR in 2018? Please clarify.