Refers to the legally or officially recognized name of an organization, document, product, etc., as opposed to a nickname or abbreviation.
Please write the official name on this document.
略称ではなく正式名称で呼んでください。
Please call it by its formal name, not the abbreviation.
This company's official name is "Yamada Shoji Co., Ltd."
Please call it by its official name.
Please use the official name on documents.
仮称 is a temporary, placeholder name used before finalization, while 正式名称 is the official name once it's decided.