I have recently applied for study permit unfortunately it got refused and then i have again l have again applied for it and my uci number doesn’t match firstly in my older filing my name was written in capital letters and now it is written in small letters is that’s why uci number is changer or what is the fact behind that and how i can solve this issue
Do you mean the application number? If you apply from the same GCKey account, the UCI number is not supposed to change since that is linked to all your previous applications. If you notice any changes to your UCI number, let the IRCC know of the error.