I recently got my TRV approved after I received my PGWP. For this purpose I sent my passport to CPC-Ottawa as requested. I Iive in Quebec and according to the website I have to buy 2 regional Xpresspost envelopes for sending and receiving them. I sent the passport accordingly but didn't realize that the larger envelope in which I sent my passport, copy of passport request letter and smaller letter for returning my passport after counterfoil has been attached is regional but the smaller one in which the passport will be returned to me is national. I went back to Canada Post office and they told me that it's not an issue if the return envelope is national. I am worried if my passport will be returned safely or there'll be any issues.