Hi Pippin,
Thanks for the reply. Yes, my maternal uncle has filled in his forms my mother as a sister and even my late grandfather also got his citizinship of canda on my uncle basis. He might also filled my mother name in his immigration application as her daughter. But he might filled my mother's current name , and my education certificates shows her previous name and as i mention before we don't have the proof of name change. My uncle been to local municiple council office for obtaining birth certificate but they issued only Untraceable certificate containing that ' Our records shows that Mrs...... is a daughter of Mr......... is not registered .' Which is not at all helpful.
Thanks again for ur reply
Vikcov
There are numerous problem like yours about names, birth certificates and marriage certificates, especially for a period before 1980. CIC is aware of such problems and they are little vulnerable in considering such requirements, except which they feel as sensitive. So, in your case, I hope whatever you have collected so far is fine as well as the solemn affidavit of your mother because such matter will be considered with caution only when you get PR and in case you sponsor your mother for her immigration. If it is difficult to obtain further more proof for relation, I don't see any other alternative except what you have already. Goo luck.