SunTrust Banks found problems in 4,000 active foreclosure cases during an internal review of its practices, the bank said Friday in a regulatory filing. Atlanta-based SunTrust said it found “technical issues” in fewer than 15 percent of active cases. The filing said some employees signed foreclosure documents without personally verifying the loan information. The practice has been labeled by some consumer advocates as “robo-signing.” “We do not believe that any potential deficiency identified violated applicable law,” the company said in its annual proxy filing. The bank also said it is “undertaking similar remedial action in nonjudicial foreclosure states as necessary and appropriate.”