Section 271D of Income Tax Act 1961 provides that if a loan or deposit or specified sum is accepted in contravention of the provisions of section 269SS then a penalty equivalent to the amount of such loan or deposit or specified sum may be levied by the Joint commissioner.
Section 269T of Income Tax Act, 1961
Section 271E of Income Tax Act 1961 provides that if a person repays any loan or deposit or specified advance referred to in section 269T otherwise than in accordance with the provisions of that section, he shall be liable to pay, by way of penalty, a sum equal to the amount of the loan or deposit or specified advance so repaid. Any penalty imposable under sub-section (1) shall be imposed by the Joint Commissioner.
3)no penalty is leviable if you are able to show it was bonafide transaction with no intention to evade tax