Yes it's very good sign as you have got an info that your package didn't lost and you have received a file# as well(maybe it's temproray).. yesterday one of us messaged that they have got the temporary file# as no visa officer have reviewed there package yetOk , today I called CIC to inquire about my mothers sponsorship and they gave me "potential" file number
My package was received May 23 ( deadline was 25th )
is this a good sign ? what does it mean . I still cant find any record when I search by my UCI
All the best for rest!