Signature Card Returned

We recently changed some of the members of our Bishopric and filled out a new signature card. The Bishop mailed it to the address on the form and it was returned to us. I checked the address on the form to the address on the envelope and see that they are the same. Is there a new way of submitting the form to the Treasury Processing Services? Is there an alternate way to submit this form?

There's a new process that apparently wasn't announced. See this post.

Also note the later post in that thread that indicates the bishop has to approve the new card.