The National Tax and Customs Administration investigates the following criminal offenses according to Act C of 2012 on the Criminal Code (hereinafter: CC.):
- Violation of International Economic Restrictions (CC. Section 327),
 - Failure to Report Violation of International Economic Restrictions (CC. Section 328),
 - Criminal Offenses with Military Items and Services (CC. Section 329),
 - Criminal Offenses with Dual-Use Items (CC. Section 330),
 - Plagiarism (CC. Section 384),
 - Infringement of Copyright and Certain Rights Related to Copyright (CC. Section 385),
 - Compromising the Integrity of Technical Protection (CC. Section 386),
 - Falsifying Data Related to Copyright Management (CC. Section 387),
 - Infringement of Industrial Property Rights (CC. Section 388),
 - Fraud Relating to Social Security, Social and Other Welfare Benefits (CC. Section 395),
 - Budget Fraud (CC. Section 396),
 - Omission of Oversight or Supervisory Responsibilities in Connection with Budget Fraud (CC. Section 397),
 - Conspiracy to Commit Excise Violation (CC. Section 398),
 - Breach of Accounting Regulations (CC. Section 403),
 - Fraudulent Bankruptcy (CC. Section 404),
 - Unauthorized Foreign Trade Activities (CC. Section 406),
 - Imitation of Competitors (CC. Section 419).
 
Furthermore, the below-listed crimes committed to the above-mentioned crimes:
- Forgery of Administrative Documents (CC. Sections 342-343),
 - Use of a Forged Private Document (CC. Section 345),
 - Criminal Offenses with Individual Identifiers (CC. Section 347),
 - Forgery of Stamp (CC. Section 391),
 - Money Laundering (CC. Sections 399-400)
 - Failure to Comply with the Reporting Obligation Related to Money Laundering (CC Section 401).