When creating the trust arrangement, a successor trustee needs to be named. This individual must carry out the terms of the trust. It is important to know that once the grantor passes away, the trust is then irrevocable and cannot be changed. The successor will then collect the trust inventory information and distribute it as the trust instructs. This process can take up to a few months, which is shorter than the probate process, which can take six months up to an entire year.