If a custodian opens a MUTMA (Michigan Uniform Transfers to Minors Act) for a minor child, it is up to the custodian to provide the funds to the child once they reach 18; we are not involved with the distribution of funds. However, are there any issues with continuing to accept deposits into the account by the custodian for the child after the child reaches 18 if the custodian has not distributed the funds and closed the account?