Lapse and anti-lapse.

Lapse and anti-lapse are complementary concepts under the US law of wills, which address the disposition of property that is willed to someone who dies before the testator (the writer of the will).

Lapse.

At common law, lapse occurs when the beneficiary or the devisee under the will predeceases the testator, invalidating the gift. The gift would instead revert to the residuary estate or be granted under the law of intestate succession.

Most common-law jurisdictions have enacted an anti-lapse statute to address this situation. The anti-lapse statute "saves" the bequest if it has been made to parties specified in the statute, usually members of the testator's immediate family, if they had issues that survived the testator. For example, the New York anti-lapse statute specifies brothers, sisters, and issue, specifically. If the anti-lapse statute does indeed apply, then the issue of the deceased beneficiary will inherit whatever was willed to the beneficiary. The testator can prevent the operation of an anti-lapse statute by providing that the gift will only go to the named beneficiary if that beneficiary survives the testator, or by simply stating in the will that the anti-lapse statute does not apply.

Ademption, or ademption by extinction.

Ademption, or ademption by extinction, is a common law doctrine used in the law of wills to determine what happens when property bequeathed under a will is no longer in the testator's estate at the time of the testator's death. For a devise (bequest) of a specific item of property (a specific gift), such property is considered adeemed, and the gift fails. For example, if a will bequeathed the testator's car to a specific beneficiary, but the testator owned no car at the time of his or her death, the gift would be adeemed and the aforementioned beneficiary would receive no gift at all.

Abatement of debts and legacies.

Abatement of debts and legacies is a common law doctrine of wills that holds that when the equitable assets of a deceased person are not sufficient to satisfy fully all the creditors, their debts must abate proportionately, and they must accept a dividend.

Ademption by satisfaction.

Ademption by satisfaction, also known as satisfaction of legacies, is a common law doctrine that determines the disposition of property under a will when the testator has made lifetime gifts to beneficiaries named in the will. Under the doctrine, a gift that the maker of the will (the testator) gives during his lifetime to a named beneficiary of the will is treated as an advance payment of that beneficiary's inheritance. If the probate court determines that the testator intended the lifetime gift to satisfy a bequest under the will, the amount of the lifetime gift is deducted from the amount that the beneficiary would have received under the will.

Acts of independent significance.

The doctrine of acts of independent significance at common law permits a testator to effectively change the disposition of his property without changing a will, if acts or events changing the disposition have some significance beyond avoiding the requirements of the will.