/ˈænsəˌlɛri ˈlɛtərz/ – Phrase
Definition: thư chỉ định người thực hiện chúc thư.
A more throughout explanation: Ancillary letters refer to legal documents issued by a probate court that authorize an individual to act on behalf of an estate when the original executor or administrator is unable to fulfill their duties. These letters are typically granted when there is a need for someone else to step in and handle the affairs of the estate.
Example: The attorney prepared ancillary letters to accompany the main legal document.