HI, I would appreciate if anyone here could give me sample letter request on asking down payment politely from client for a certain project.
Welcome to the forum, Stacy.
We like to help when we can, but we don't write letters for people, and we don't offer sample letters. If you'd liike to write your own letter and post it here: Letter Writing, one of our members may offer corrections and suggestions. You ned to be aware, however, that not many of us have time for that sort of work, and you may not not receive help as quickly as you'd like.
A good general rule for letters in English is to say what you want to say clearly and concisely. You do not have to worry about a special language for official letters.