Using the expected format, or putting key information where the reader can find it, is an example of

professional etiquette.
standardized font.
stylistic tools.
address block.

Using the expected format or putting the key information where the reader can find it, is an example of professional etiquette.

professional etiquette.

Explanation:

While writing a formal letter, electronic mail, a notice, or any other formal piece of writing, it is very important to confer with the specified format. It reflects the knowledge and basic professional etiquette of the sender.

Moreover, it is the responsibility of the sender to provide the essential required information to the reader and that too in a specified format so that the reader does not have to face any problems in locating it.