All trusts fall into one of two main categories – testamentary or living trust. A testamentary trust is one that does not become active until the death of the Settlor. Typically, a testamentary trust is triggered by a provision in the Settlor’s Last Will and Testament. A living trust, formally known as a “inter-vivos” trust, activates as soon as all of the formalities of creation are complete and the trust is funded. Living trusts can be further divided into revocable and irrevocable living trusts. As the names imply, a revocable living trust can be revoked or terminated by the Settlor at any time and for any reason whereas an irrevocable living trust cannot be revoked or terminated by the Settlor after the trust becomes active.