Minn. R. Adop. P. 33.08
A parent's consent to adoption may be withdrawn for any reason within ten (10) working days after the consent is executed and acknowledged or pursuant to the law of the state where the consent is executed. Written notification of withdrawal of consent shall be received by the agency to which the child was surrendered no later than the tenth working day after the consent is executed and acknowledged. On the day following the tenth working day after execution and acknowledgment, the consent shall become irrevocable, except upon order of a court of competent jurisdiction after written findings that the consent was obtained by fraud. In proceedings to determine the existence of fraud, the adoptive parents and the child shall be made parties. The proceedings shall be conducted to preserve the confidentiality of the adoption process. There shall be no presumption in the proceedings favoring the biological parents over the adoptive parents. Failure to comply with the terms of a communication or contact agreement order entered by the court under Rule 34 is not grounds for revocation of a written consent to an adoption after that consent has become irrevocable.
Minn. R. Adop. P. 33.08