I came into BC from the US September 2005 with my common law spouse (PR) of six years sponsoring my residency. I applied for PR in March 2007 and all went well with initial approval and issuance of a work permit but no PR card yet. My spouse and I split up in April 2008 and she sent a letter to Immigration in May 2008 to withdraw her sponsorship. I talked to Immigration call centre, they confirm receipt of her letter but no action has been taken on it...still no action taken at one year. Most information I've read on the web, including official immigration Canada manuals, state that sponsorship can be withdrawn up to time the PR is issued; however, I also read in the Immigration website that there are valid and invalid reasons for withdrawing sponsorship and Immigration can in fact reject the withdrawal. Any experiences in this area?