California Partition Law Blog
Civil Code section 2924 states that “every transfer of an interest in property, other than in trust, made only as a security for the performance of another act, is to be deemed a mortgage.” The “other than in trust” portion of the statute refers only to express trusts, however, because “under a deed of trust the trustee obtains none of the incidents of ownership, other than the right to convey upon default.” (Blair v. Blair (1941) 44 Cal.App.2d 140, 146.)
As such, the functionality of the deed of trust is more or less identical to a mortgage. In terms of semantics, however, the big difference is that the mortgage is a two-party transaction whereas the deed of trust involves three. In addition, there is also a difference with how title actually passes with deeds of trust.
Filing a successful partition complaint can be quite difficult depending on the circumstances. There are a great number of statutes that need to be precisely followed, otherwise the court is likely to toss the complaint out on a motion to demurrer.