In reality this is not correct!
I changed address, I applied for USPS delivery informed and I filled out the "change address form"
I was sure to not get any USCIS mail, instead last Saturday I get my interview letter to my new address, despite USCIS sent it to my old address.
There was the typical yellow tag, and actually USPS re-address it...
Now I do not know if it was a mistake, if they get confused..but I actually got a IL...
I am sure that USCIS sent one also to my husband (in my previous post I said that we got a copy of our IL going directly to the USCIS office, so I know that there is another IL),he did not get his IL...and I am sure that it is because he is not register for delivery informed and he did not filled out the change of address form.