Citibank Credit Card Complaint

Citibank Credit card department,

Credit determination Pennsylvania

I have a Bloomingdale 's credit card and been a loyal customer for a little over a year now. My bill is paid on-time everymonth. Today -/-/2015 I received a letter in the mail from them date - -, 2015 that they were decreasing my credit limit from $600.00, to $500.00, because they ran my credit and seen that my credit score had dropped, I never authroized them to check my credit and before assuming my credit score dropped because of myself they should have verfiied with me to see if I had some ID theft resulting in fraudulent accounts being open in my name. What crazy about the letter is that although I 'm just receieving it, it says that they ran my credit in -/-/2015 and seen this drop and now two months later are decreasing my limit, after I just paid the bill. So now I feel like they are profiling me and assuming I 'm not going to pay my bills. As of today - 2015 my credit score has return back to normal and is fair, my credit score has increased again because I had those fraudulent accounts removed.