Accounts-in-trust are typically set up for minors, and transfer of ownership will occur when the minor reaches legal age.
The person managing an account in trust is a fiduciary to the ultimate owner or beneficiary of the account. A good example of such accounts are accounts managed by adults for minors, such as Uniform Transfers to Minors (UTMA) accounts. The term can also be used generically for any trust account, regardless of whether there is a formal trust agreement.