If you (the sponsor) or (the Permanent residency applicant) would like CHC-Islamabad to make a change of his/her mailing address on your application, you must submit your address with an originally signature request. CHC-I do not accept new contact information by email; as to ensure the security of your documents and personal information.
You can either sent the request by fax No: (92-51) 208-6913 & 208-6914 or mail them to: Islamabad High commission of Canada, visa section, PO box 1042, Islamabad 44000, Pakistan with the following information:
•your original request to change your mailing address,
•the full name of the sponsor or the applicant and his/her original signature,
•the sponsor's or the applicant's date of birth,
•the file number [letter followed by a nine-digit number],
•telephone number, including area code,
•the mailing address, and
•E-mail address
Change of address notifications for applications at visa offices must always be submitted directly to the visa office processing the application.
Hope it helps.
Thanks so much. I faxed Islamabad today at both 6913 and 6914 fax numbers!