A fiduciary deed is executed by a fiduciary. This happens when a trustee is appointed to deal with the property. An example would be when the property belongs to a minor and a guardian is appointed to handle legal matters until the property owner is of age.
Another type of deed is the general warranty deed, which is similar to a grant deed. There is one major difference and that is, warranty deeds have a third guarantee. The third guarantee is that the title is free of any defects, even if a previous owner caused the defect. Depending on state law, a phrase such as "conveys and warrants" is included. These are considered operative words of conveyance.
A release deed or a deed of reconveyance is held by a trustee under a deed of trust loan and when the loan is repaid, it releases (or conveys) the deed back to the grantor.
A security deed replaces a mortgage and is used when the owner borrows against the property and the lender requires an interest in the property. The owner keeps using the property but the lender has title to it until the loan is repaid.