Thanks for your reply, my country is Pakistan and my father and uncle were born before partition of Pakistan, so provision of birth certificates are very difficult for me. However, my uncle sent me following letters/documents.
1. Copy of Passport
2. Copy of Citizenship
4. Copy of his Matric certificate
3. Notarized letter from uncle which shows that my father is his real brother
4. Simple letter which shows that if you come in Canada I and your cousins will help you and they have enough space for provision of accomodation etc.
Are these documents are enough for me. My uncle was living there since 1974 and he don't remember that when he applied for immigration he filled the form of relatives. Could you tell me on that time (1974) whether this form was part of application or not. If this form was part of application then it will be helpfull for me?
I am sorry but I dnt have that much information. Do you have passport copy of your father...or any other document in which your grandfather's name mentioned. Any certificate shuld also work...in which your grandfather's name is mentioned. That doc will prove that your uncle and your father are brothers.
Your uncle have passport in which your grandfather's name must be mentioned. So you just need to find out any document for your father (with your grandfather name on it.)
e.g. matriculation certificate, Birth certificate, Passport copy, etc.