SHWARTZ, Circuit Judge.

The Estate of William DeMuth, Jr. (“Estate”) appeals the United States Tax Court’s order denying his petition challenging the Internal Revenue Service’s (“IRS”) notice of estate tax deficiency arising from the Estate’s failure to include the value of several checks on the Estate tax return. Because the Tax Court properly found that the checks were not completed gifts and thus their value should have been included in the value of the gross estate, we will affirm.

I

In 2007, William DeMuth, Jr., (“Decedent”) signed a power-of-attorney agreement appointing his son Donald DeMuth 1 as his agent. In that capacity, Donald made annual monetary gifts to family members from 2007 to 2014. The Decedent was diagnosed with an end-stage medical condition in early September 2015. On September 6, 2015, Donald wrote out eleven checks to family members totaling $464,000 2 from his father’s investment account with the Mighty Oak Strong America Investment Company (“Mighty Oak”) and mailed or personally delivered the checks to the payees. The Decedent died on September 11, 2015. Ten of the checks were paid from the Mighty Oak account to the respective payees after the Decedent’s death.

As executor of the Estate, Donald filed an estate tax return in December 2016, which excluded the value of the ten checks from the Estate’s assets. The IRS determined that the Estate’s return should have included the value of the checks and so it issued a notice of deficiency for estate tax due in the amount of $179,130.

The Estate petitioned the Tax Court for reconsideration of the deficiency. Before the Tax Court, the IRS agreed to exclude three of the checks from the total, which reduced the deficiency to $131,774. 3 The Tax Court held that the funds from the remaining seven checks were part of the Decedent’s estate because the checks were not completed gifts under Pennsylvania law before the Decedent’s death. Id. at 4-9.

The Estate appeals.

II 4

A federal estate tax is “imposed on the transfer of the taxable estate of every decedent who is a citizen or resident of the United States.” 26 U.S.C. § 2001(a). The “taxable estate” for purposes of the estate tax is the value of the decedent’s gross estate less any allowable deductions. Id. § 2051. The gross estate consists of the value of the decedent’s property and interest in property at the time of the decedent’s death, id. §§ 2031(a), 2033, including the “amount of cash belonging to the decedent at the date of his death, whether in his possession or in the possession of another, or deposited with a bank,” 26 C.F.R. § 20.2031-5. In the case of gifts of such property, where “the donor has so parted with dominion and control as to leave in him no power to change its disposition . . . the gift is complete,” and therefore the value of the gift is not includible in the gross estate. 26 C.F.R. § 25.2511-2(b).

A gift is “incomplete in every instance in which a donor reserves the power to revest the beneficial title to the property in himself.” 26 C.F.R. § 25.2511-2 (c). We apply state law to determine when a gift in the form of a check is completed. See, e.g., Burnet v. Harmel, 287 U.S. 103, 110 (1932) (“[S]tate law creates legal interests but the federal statute determines when and how they shall be taxed.”); Metzger v. Comm’r, 38 F.3d 118, 121 (4th Cir. 1994) (“We refer to state law to determine whether a donor has relinquished dominion and control over a gift in the form of a check[.]” (citing Estate of Dillingham v. Comm’r, 903 F.2d 760, 763 (10th Cir. 1990))); Rev. Rul. 96-56, 1996-2 C.B. 161 (noting local law applies to determine whether a check from a donor is a complete gift).

Under Pennsylvania law, 5 an inter vivos gift is a gift given with the intention of being completed when the donor is living. Titusville Tr. Co. v. Johnson, 100 A.2d 93, 96 (Pa. 1953). To find an inter vivos gift has been completed, there must be (1) an intention to make the gift and (2) an “actual or constructive delivery at the same time, of a nature sufficient to divest the giver of all dominion.” Id. at 96-97. In the case of a check, delivery of the check alone does not complete the gift because the donor may revoke the gift up until the time it is deposited or cashed. ^[6] In re Eshenbaugh’s Estate, 174 A. 809, 811 (Pa. Super. Ct. 1934) (citations omitted); see also In re Kern’s Estate, 33 A. 129, 129 (Pa. 1895) (“[T]he delivery of a . . . check is not an executed gift of the money, but remains revocable, and will be revoked by the death of the promisor before actual payment.”). This is consistent with Pennsylvania’s Commercial Code, which allows for a drawer of a check to stop payment on the check until the earliest of the drawer’s bank accepting, certifying, or making final payment of the check. See 13 Pa. Cons. Stat. §§ 3409, 4403(a), 4303(a).

Here, the seven checks at issue were all deposited and paid after the death of the Decedent. Because there had not been “actual or constructive delivery . . . of a nature sufficient to divest the giver of all dominion,” Titusville, 100 A.2d at 96-97, the checks were still revocable at the time the Decedent died. The Decedent therefore still “reserve[d] the power to revest the beneficial title to the property in himself,” 26 C.F.R. § 25.2511-2 (c), and thus the inter vivos gifts here were not completed and remained part of the Estate. See Estate of Gagliardi v. Comm’r, 89 T.C. 1207, 1213 (1987) (applying Pennsylvania law and holding that checks delivered to the payees before, but paid after, the decedent’s death are part of the gross estate for federal estate tax purposes). 7 The Estate argues that the seven checks at issue were properly excluded because they were given in contemplation of Decedent’s death, and therefore were completed gifts in causa mortis. Under Pennsylvania law, gifts “causa mortis” are gifts “prompted by the [donor’s] belief . . . that his death is impending, and [are] made as a provision for the donee if death ensues.” Titusville, 100 A.2d at 96. Pennsylvania courts have found that where the circumstances support a finding of a gift causa mortis, checks delivered before, but paid after, the decedent’s death are completed gifts. See, e.g., In re Estate of Smith, 694 A.2d 1099, 1102 (Pa. Super. Ct. 1997); In re Fleigle Estate, 13 Fiduc. 2d 141, 145-47 (Pa. C.C.P. 1993), aff’d on other grounds, In re Estate of Fleigle, 664 A.2d 612 (Pa. Super. Ct. 1995).

A gift causa mortis differs from an inter vivos gift in that “it is made when the donor believes he is about to die, and is revocable should he survive.” Estate of Smith, 694 A.2d at 1102 n.2. To determine whether a gift was given in causa mortis, one must show that “at the time of the alleged gift, the decedent intended to make a gift, the decedent apprehended death, the res of the intended gift was either actually or constructively delivered, and death actually occurred.” Id. at 1101. Whether a gift was given in causa mortis thus “depends primarily upon the state of the donor's mind.” Titusville, 100 A.2d at 97. To determine this, “the attendant circumstances should be considered, including the nature and extent of his sickness, illness or injuries, his physical condition, his conduct, and anything that was said to and by him.” Id.

The Estate has not shown that the Decedent wrote the checks as gifts in causa mortis. The only evidence arguably supporting this point is that the Decedent was diagnosed with an end-stage medical condition in early September 2015, and that the yearly gifts given to family members were generally given in December rather than September. There is no evidence, however, that indicates the Decedent directed Donald to distribute the September 2015 checks in contemplation of his death. ^[8] In fact, the record reflects that the only directions the Decedent gave to Donald as his agent was that Donald was authorized to “give gifts to Decedent’s issue in an amount not to exceed the annual exclusion from the federal gift tax,” and to “give gifts to any permitted donee for tuition.” App. 18-19. As such, the Estate’s argument that the checks were properly completed gifts causa mortis fails because there is nothing to show that the Decedent contemplated death when the checks were written on his behalf. Thus, the value of the seven remaining checks was improperly excluded from the gross estate.

III For the foregoing reasons, we will affirm.