You'll want to double check this with your bankruptcy legal counsel in case I'm missing something, but I think if the consumer reaffirms the debt you'd be required to start sending the standard statement again. I know you lose the exemption from the requirement to send periodic statements under 1026.41(e)(5)(i) in that case, and I think the correct statement would be the "standard" periodic statement, not a bankruptcy version.
For those that get a discharge you continue to send the modified bankruptcy versions of the periodic statement because they no longer owe the debt. You do that presumably until you foreclose on your lien or take whatever action you want to around your security interest in the property.
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My opinion, take it for what its worth. Opinions expressed are my own and not those of my employer and are not legal advice.