An Acknowledgment of Receipt (AOR) is an official letter that IRCC sends you confirming they have received your application and will start processing it. When can you expect to receive your Acknowledgment of Receipt?, An Acknowledgment of Receipt (AOR) is an official document that confirms that Immigration, Refugees, Citizenship Canada (IRCC) has received your application. Find out if you're eligible for Canadian immigration, What is an Acknowledgment of Receipt (AOR)? An Acknowledgment of Receipt (AOR) is an official confirmation issued by Immigration, Refugees and Citizenship Canada (IRCC) stating that an immigration application has been received and is in processing., Acknowledgement of Receipt or AOR in Canada is a document that reflects when the immigration authorities received your written application., The Acknowledgement of Receipt is a formal notification issued by Immigration, Refugees, and Citizenship Canada (IRCC) as confirmation that your application has been received and is complete. The AOR serves as an official record indicating that your immigration file has entered processing., An Acknowledgment of Receipt (AOR) serves as an official confirmation from Immigration, Refugees, Citizenship Canada (IRCC) that they have successfully received your application..