I was approved to sponsor my husband 8 months ago. We just received a letter from immigration stating I need to provide evidence of Canadian residency in the form of utility bills, tenancy agreements, bank statements, evidence of employment, etc.. in order for them to complete the processing of his application.
The thing is, I have been living ´exclusively outside of Canada (in the USA with my American husband) for almost 4 years now so I obviously don´t have those documents. When I filled out the sponsorship documents, I checked the Residency Declaration (Section F of the ´Application to Sponsor and Undertaking´) document, stating that I will live in a province or territory other than Quebec once my husband is a permanent resident.
If Immigration knows this, why are they asking for proof of residency?
Are they referring to the span of time I lived in Canada before I moved in the USA?
What should I do here?

Please, any info on this is greatly appreciated. Thanks!

Samantha