PMI R.E.P.s are organizations that we have approved to offer training in project management and issue professional development units (PDUs) to meet the continuing education requirements needed by PMI credential holders.
To earn the R.E.P. designation, a provider must meet or exceed rigorous standards for quality and effectiveness as defined by PMI.
If you are looking for an official PMI education site (REP), you can always find an updated list on the PMI global page. here