G.R. No. 177279 ; October 13, 2010
COMMISSIONER OF INTERNAL REVENUE, Petitioner, vs. HON. RAUL M. GONZALEZ, Secretary of Justice, L. M. CAMUS ENGINEERING CORPORATION, Respondents.

FACTS

The Bureau of Internal Revenue (BIR) conducted a tax fraud investigation against L. M. Camus Engineering Corporation (LMCEC) for taxable years 1997-1999 based on informer data indicating substantial underdeclarations of income. The BIR issued a Letter of Authority and, after investigation, assessed LMCEC for deficiency taxes exceeding ₱430 million. The BIR served a formal letter of demand and assessment notices. Upon LMCEC’s alleged failure to protest within the 30-day reglementary period, the BIR referred a criminal complaint for tax evasion to the Department of Justice (DOJ).
LMCEC countered that the assessment was invalid and the DOJ had no jurisdiction. It argued that the taxable years in question had already been subjected to routine examinations, which were closed via a termination letter for 1997 and under tax amnesty programs (ERAP and VAP) for 1998 and 1999. LMCEC contended that the NIRC generally permits only one examination per taxable year and that its availment of the amnesty programs negated fraud and granted immunity from further audit. It claimed the BIR’s subsequent fraud investigation was improper without first establishing a prima facie case of fraud.

ISSUE

Whether the Secretary of Justice correctly dismissed the criminal complaint for tax evasion against LMCEC.

RULING

Yes, the Court affirmed the dismissal. The legal logic centers on the BIR’s failure to comply with its own prescribed procedures for initiating a valid fraud investigation. Revenue Memorandum Order (RMO) No. 15-95 mandates a two-step process: first, a preliminary investigation to establish a prima facie existence of fraud; second, only after such a finding, a formal fraud investigation via a Letter of Authority. The BIR’s Letter of Authority in this case was issued prematurely, based merely on an informer’s tip, without a prior preliminary investigation to establish prima facie fraud. Consequently, the ensuing audit and assessment were void, as they violated the NIRC rule allowing only one examination per taxable year, absent fraud or other exceptions. The Court held that the BIR cannot shortcut its rules; the requirement of a prior preliminary investigation is a substantive condition for a valid fraud audit. Since the assessment was invalid, the criminal complaint for evasion based on that assessment was correctly dismissed for lack of probable cause. The availment of tax amnesty programs, while noted, was not the primary basis for the ruling, which hinged on the procedural invalidity of the investigation itself.