The Central Board of Secondary Education (CBSE) conducted a series of surprise inspections at 29 schools in Delhi, Bengaluru, Varanasi, Bihar, Gujarat and Chhattisgarh to check enrolment of 'dummy' students, officials said on Thursday.

According to CBSE Secretary Himanshu Gupta, a total of 29 teams, comprising a CBSE officer and a principal from an affiliated school, conducted the inspections.

"Majority of the inspected schools were found to have violated the Board's Affiliation Bye-Laws by enrolling students beyond their actual attendance records, effectively creating 'non-attending' enrolments. Additionally, schools were found to be flouting infrastructural norms of the board," Gupta said.

"CBSE has taken these violations seriously and is in the process of issuing show-cause notices to the schools found in breach of regulations. The Board is also considering legal action against the defaulting institutions," he added.  The inspections were conducted on Wednesday and Thursday.

Eighteen of the violating schools are in the national capital, while there are three in Varanasi, two each in Bengaluru, Patna, Ahmedabad, Bilaspur, and Chhattisgarh. Scores of students preparing for engineering and medical entrance exams prefer to take admission to dummy schools so that they can focus solely on their preparations for the competitive exams. They do not attend classes and straightaway appear in the board examinations.

Aspirants also choose dummy schools keeping in mind the quota in medical and engineering institutes available for the students from certain states. For example, the candidates who have completed classes 11 and 12 in Delhi are considered for admission to the medical colleges of the national capital under the Delhi State Quota.