How to write the opening line of a letter addressed to the head of an institution?

[chitraaa]

How to write the opening line of a letter addressed to the head of an institution from whom I have received a show-cause letter? Is this opening written by me correct?

Dear madam,
This is to bring to your kind notice the following points with reference to letter number 194, dated 25.08.2022:
1. . . .

 

[emsr2d2]

How to What should I write in the opening line of a letter addressed to the head of an institution from whom I have received a show-cause letter? Is this opening written by me correct?

Dear Madam,

This is to bring to your kind notice I would like to bring the following points to your attention, with reference to letter number 194, dated 25.08.2022:

See above. Note that we do not open any question with "How to".

I don't know what the underlined part means.

 

[Tarheel]

A show cause letter would be something from a lawyer.