By law (the FCRA) at least the credit agencies must fully reinvestigate within 30-45 days to an allegation of a credit report inaccuracy, and respond within another 5 days:
§ 611. Procedure in case of disputed accuracy [15 U.S.C. § 1681i]
(a) Reinvestigations of Disputed Information
(1) Reinvestigation Required
(A) In general. Subject to subsection (f), if the completeness or accuracy of any
item of information contained in a consumer’s file at a consumer reporting
agency is disputed by the consumer and the consumer notifies the agency
directly, or indirectly through a reseller, of such dispute, the agency shall, free
of charge, conduct a reasonable reinvestigation to determine whether the
disputed information is inaccurate and record the current status of the disputed
information, or delete the item from the file in accordance with paragraph (5),
before the end of the 30-day period beginning on the date on which the
agency receives the notice of the dispute from the consumer or reseller.(B) Extension of period to reinvestigate. Except as provided in subparagraph (c),
the 30-day period described in subparagraph (A) may be extended for not
more than 15 additional days if the consumer reporting agency receives
information from the consumer during that 30-day period that is relevant to
the reinvestigation.(C) Limitations on extension of period to reinvestigate. Subparagraph (B) shall
not apply to any reinvestigation in which, during the 30-day period described
in subparagraph (A), the information that is the subject of the reinvestigation
is found to be inaccurate or incomplete or the consumer reporting agency
determines that the information cannot be verified.…
(6) Notice of Results of Reinvestigation
(A) In general. A consumer reporting agency shall provide written notice to a consumer
of the results of a reinvestigation under this subsection not later than 5
business days after the completion of the reinvestigation, by mail or, if authorized
by the consumer for that purpose, by other means available to the agency.
Your lawyer should be telling you this! What are you paying him for?