Cendant Corporation came clean yesterday on its investigation of accounting irregularities and errors committed by CUC International, one of the two companies that merged to create Cendant last year. Cendant says it will reduce its earnings from last year by $392 million.Quarterly financial statements for 1998 and the comparable periods of 1997 will be filed with the SEC on Form 10-Q this morning. Full restated, audited financial statements for Cendant’s fiscal years 1997, 1996 and 1995 will be filed with the SEC on Form 10-K/A later this month. Cendant uncovered more than $300 million in phony revenue booked by CUC and more than $200 million in accounting errors. CUC’s founder and Cendant’s chairman, Walter Forbes, along with nine other Cendant directors from CUC, resigned last month as CUC’s systematic fraud was uncovered. Cendant was formed by a merger of HFS Corp. and CUC International. CUC specialized in club memberships marketed to credit card holders. Cendant’s market value has declined $20 billion in the wake of the scandal.