applying for UK spouse visa with dual nationality

Hello,
I am a Canadian citizen applying for a UK Spouse visa from Canada. I also hold an Iranian citizenship, meaning I have dual nationality when I apply for my visa.

I know I have to send my Canadian passport along with my documents, but I am not sure if I also need to send my Iranian passport as well. Do I send both?

Thank you

Yes, send both.

It says "your own original passport" so I would assume that means any passport you currently hold.

thank you

Is this definitely required? I know the rules have changed since 2009, when I applied, but I also have dual nationality and was never required to send in my other passport--only the passport I was applying for the visa in. There was a place on the form to indicate my other passport though.

I'm not trying to steer the OP astray, I just wondered if anyone had a link specifically stating the requirement to send all passports in. I know that's true for a British passport application.

Also, this is in the tax forum but I don't know how to move it to the visa forum