Dispute bad credit

i once had a company dispute my bad credit. they told me that all bad credit has to go through a series of laws before it can be posted on my credit report and that the process is so long that the majority of companies don't do it.
and that was how he was removing my bad credit by asking if it was reported legally and if they responded yes he would ask for proof and eventually it would get removed.
my question is how do i get that program or how do i go about doing it that way? please help
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use the debt validation letters on my website
http://www.oskie.com/free-credit-help-sample-form-letter-letters.htm
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