The phrase "an introductory note" is correct and usable in written English.
It can be used when referring to a preliminary statement or explanation that provides context or background information for a document or presentation.
Example: "Before diving into the main content, I would like to provide an introductory note to clarify the purpose of this report."
Alternatives: "a preliminary remark" or "an opening statement".
Pickering, F. P. The Calendar Pages of Medieval Service Books: an Introductory Note for Art Historians.
(It bears, as an introductory note explains, "an uncanny resemblance" to the real village of August Town, which was absorbed into the sprawl of Kingston).
In an introductory note for the documents, Mr. Klein wrote he was "presenting this information to facilitate the dismantling of this dangerous Orwellian project".
(In an introductory note, the translator, Neil K. Besner, describes his difficulties with the more florid rhythms of Portuguese, and perhaps these gave the original more dramatic tug).
Editor Ed Folsom, a professor at the University of Iowa, writes in an introductory note that the remarkable find will "alter the course of Whitman scholarship and biography".
In an introductory note, Kremer hails Weinberg as a "great composer... a personality with an impressive and obvious 'signature.' " I'm not sure I agree.
It WAS in fall 2005 when Moses' whirling, Stoppardesque farce "Bach at Leipzig" bowed in a glittering off-Broadway production, bearing an admiring introductory note by no less than Tom Stoppard himself.
It is composed of a short introductory note and a buzzy trill.
He included a short introductory note — "in order to be totally transparent, I am releasing the entire email chain of my emails" — typed in Calibri.
Powell, RJ. "Images and Identities: A Brief, Introductory Note". The International Review of African American Art 11.3: 6-6.
See www.oecd.org/els/employment-outlook-statistical-annex.htm, which provides a general introductory note about scope and comparability, tables for expenditure and participants in the main programme categories and subcategories, country-specific notes, and access to the online database.
