Thе plaintiffs, grandchildren and heirs of Zella H. Wignall, deceased, sue claiming a share of six bank accounts held in joint tenancy by their grandmother and her two daughters, defendants Leona Wig-nall Hales and Blanche Wignall Tew, who are alsо thus aunts of the plaintiffs. The case was tried to the court. After the plaintiffs presented their evidence defendants moved for dismissal which was granted. Plaintiffs appeal.
The bank accounts referred to had been creatеd by the deceased as joint accounts with her daughters several years prior to her death. They were of the type commonly used, providing for joint tenancy in the funds; that either could withdraw them; and for the right of survivorship. All of the money had been deposited there *346 in by the deceased. The passbook was kept in a dresser drawer in the deсeased’s home at Springville, Utah. On January 28, 1963, she fell and broke her hip; on February 2d entered the Utah Valley Hospital and died on March 6th. Meanwhile, on February 18, 1964, prior to their mother’s death, defendants had withdrawn from the bank accounts $20,091.74 which they divided between them.
Plaintiffs contend- -that in the setting up of these accounts their grandmother did not intend to give thе defendants ownership in the funds, nor to create a true joint tenancy with right of survivorship. They urge that the accounts wеre put in that form merely as a convenieht arrangement so the defendants could withdraw money to serve the needs of their mother if and when that should become necessary in her old age.
As part of their attack on these accounts the plaintiffs advance the argument that they do hot possess the four unities of title, interest, time and possession, characteristic of “joint tenancies” and of “estates by the entirety” in real property at сommon law. -Except for the fact that they are sómewhat 1 ' remote descendents, joint tenancy bank ' accounts in modern concept are not concerned with nor limited by those vestigial forms; and the unities mentioned arе not essential 'to the validity of bank accounts of this character. They are creatures of contract as expressed in the wording on the cards. 1 This is an agreement between the bank and the parties, fixing the-conditions’upon which the money is deposited; upon which it maybe withdrawn; and the. rights of' the 'parties between themselves. - Such' á deрosit card when duly signed is entitled to the same sanctity as any other duly executed written contract.
We are thus, brought tо a consideration of the principal difficulty confronting the plaintiffs: They are trying to defeat the effect of a written instrument. It is endowed with a presumption of validity. Its provisions, including the recited facts of joint fenancy with right of survivorship, must be given effect unless it is successfully attacked on some proper ground; and it- can only be overcomе bv clear and convincing evidence. 2
*347 Whether 'the required quantum of proof has been met is for the trial court tо determine. 3 When' it has done so, we could rule to the contrary only if all reasonable minds would so believe from the evidence. No siich conclusion is warranted here. Rejection of plaintiffs’ proof as insufficient to overcome the effect of the joint tenancy with right of survivorship in these accounts finds support in the fact that they had .been created in that form and had continued to so exist for several years prior to Mrs. Wignall’s death; and by the further fact that it is shpwn that on two -occasions' she had requested defendants to have the accounts changеd to their ■own names.
Sustaining this judgment is in harmony with the closely analogous case of Haywood v. Gill, 4 recently decided by us. Therein we pointed to the joint tenancy account and stated, * * The trial court could regard the account as just what it purported to be * * * [joint tenancy with right of survivorship] in view of the documentary foundation of his findings, in the absence of clear and convincing evidence to the contrary, they should not be disturbed.” 5
Affirmed, Costs to defendants (respondents).
Notes
. See Marble v. Jackson,
. The rule that written documents duly executed are. endowed.with a .presuinption of validity and will be given effect unless overcome by elear and convincing evidence is supported .by innumerable cases. Some examples from this court are: Univеrsal C. I. T. Credit Corp. v. Nelson et al.,
. See Child v. Child,
.
. In this respect different from cases cited by plaintiffs: Culley v. Culley,
