Working a case in Bakersfield with PG&E. Their tariff says 2 years but CPUC Rule 10 mentions different timeframes. Client was underbilled $23,000 over 4 years. What's the actual limit?
California PG&E backbill limits - found conflicting info
California is weird. CPUC Rule 10 allows 4 years if customer caused the error through fraud or tampering. But utility error is capped at 2 years under the tariff.
I've seen PG&E try to go back 4 years claiming "customer knowledge" of the error. Push back hard unless there's clear evidence of tampering or fraud.
Just dealt with this exact scenario. PG&E backed down to 2 years when I showed them their own tariff language. Saved client $11,000 in invalid backcharges.