Where do I send flips for crossed-over cards?

I'm sure there is a really simple answer to this:
I've cracked 25-30 PSA slabs for crossovers to my registry on another company's site recently. Now, like many of you, I hate the inaccuracies in population reports so I saved all the flips. What is the best way to let PSA know that these are no longer valid slabs and should be removed from the pop reports? Should I scan them and email to someone? If so, who? Is mailing them best? If so, who's attention should they go to? I'm not trying to be a jerk and I have no problem with PSA's service. I have registries here too. I've never done this before and would like to help out the community/hobby a bit. Thanks in advance for your help.
I've cracked 25-30 PSA slabs for crossovers to my registry on another company's site recently. Now, like many of you, I hate the inaccuracies in population reports so I saved all the flips. What is the best way to let PSA know that these are no longer valid slabs and should be removed from the pop reports? Should I scan them and email to someone? If so, who? Is mailing them best? If so, who's attention should they go to? I'm not trying to be a jerk and I have no problem with PSA's service. I have registries here too. I've never done this before and would like to help out the community/hobby a bit. Thanks in advance for your help.
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Comments
att Cosetta?
Steve
I was thinking the same thing lately, but didn't get the chance to ask.
Giovanni