Which document serves to modify a will without replacing it?

The document that serves to modify a will without replacing it is a codicil. A codicil is essentially an addition or supplement to an existing will, allowing a testator to make changes or clarifications regarding their estate planning without the need to execute an entirely new will. This is particularly useful for small amendments, such as changing an executor, updating beneficiaries, or addressing specific bequests.

In terms of functionality, a codicil must be executed with the same formalities as a will, including being in writing and signed by the testator, often in the presence of witnesses. This ensures that the modifications are legally binding and part of the estate planning.

While a will amendment and other documents may serve as means to convey a testator's intentions or clarify certain points, they do so typically by creating a new document that fully supersedes the original will, rather than simply modifying it. Therefore, the codicil remains a distinct tool in estate planning for making specific adjustments while keeping the main structure of the original will intact.