I am sponsoring my mom from UK. I retained a lawyer as we have a couple of issues. Thank you to this wonderful forum and its members , I found out about updated forms just before my lawyer sent them. So there was a discussion to send updated forms or the old version and here is a comment from my lawyer’s office- do submit updated versions of the application documents as IRCC will return the package as incomplete. Now we are in a rush to update them and My mom , me and my co-signer again have to sign them. It is a bad play from IRCC and what my lawyer’s office thinks is that how they are going to eliminate this extra number of applications that they allowed (26,000+ instead of 20,000) . So my advice , if you haven’t submitted the application yet, update docs before you submit it, otherwise there is a high chance for them to be returned as incomplete. I know there was a twitter post by IRCC saying otherwise but there is a history of them being wrong, don’t take a chance a submit updated versions.
Good luck all