604(b) of the FCRA requires a clear and conspicuious notice to the employee. This is generally accepted as a stand alone notice. Your brief description of the scenario doesn't insinuate that this is the case. That should be corrected.
A notice that says we will access your credit bureau report can specify "this time", or "throughout your period of employment". But annual reminders in conjuncion with ethics updates are a good practice.
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AndyZ CRCM
My opinions are not necessarily my employers.
R+R-R=R+R
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell