charge offs, dont recognize, old charge offs

Hi Bo…I have several accounts on my credit report that are charged off. However, some have no open date nor original debtor and I have no idea when or even if I opened them. A couple show to be closed but collection companies picked them up and are wanting money after the fact. Who do I pay to correct this?
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Dispute anything old or unknown as not yours.
Use this free credit dispute form.
Send it certified mail.
read directions
addresses on form