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I've heard that you should periodically run your credit report? Is this true? If so, how often? Thank you in advance!
I pull all 3 every day.
Its always wise to pull periodically to check for items such as potential identity theft and "submarine" collections where a debt collector does not fulfill their requirement to send dunning notice.
One solid, zero-cost method is to pull your free annual credit report from annualcreditreport.com, staggered every four months with the three CRAs.
You should consider subscribing to a CMS also.
It's your reputation so you may want to see what everyone else is seeing. IMO once a month is a good number.