Odd letter from Experian

I have been disputing a paid medical collection that is on my CR. It was my hubby’s debt that they put on my credit. I have managed to get it removed from all CR except Experian.  They are not wanting to budge. I have sent them letter after letter and they validate. I recently sent them an intent to sue letter CRRR and this was their reply.

 

” We recieved a suspicious request regarding your personal credit information that we have determined was not sent by you. This could be deemed as deceptive or fraudulent use of your information. We have not taken any action on this request. Any future requests made in this manner will not be processed and will not recieve a response. Suspicious requests are taken seroiusly and reviewed by Experian security personel who will report deceptive activity, including copies of letters deemed as suspicious, to law enforcement officials and to state or federal agencies.”

 

Can anyone tell me why they would send this and what my next step should be?

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