micmac101 said:However, if you've applied for any kind of visa before to Canada your UCI number remains the same.tink23 said:If you're unsure of it and can't find it just leave it blank. They will fill it with the number when they find it in their system. We left it blank when making a 2nd visitor visa application after being granted the first one.... the UCI was actually on the visa in the passport, but there were so many numbers that we weren't sure which one was UCI number so left it blank. Wasn't an issue in the least.
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The UCI # is when you send it in and they process the application when your approved to sponsor or its the receipt # from money order or certified checque.