I do know it doesn't cost anything, I just wanted to make sure it won't negatively affect the application.it will not cost you anything to send a letter. why do you always have to ask others for something that u need so badly given your circumstance.
Isn't that why this forum exists in the first place? So that if people are uncertain of something then they can come here and ask for advise. I wasn't asking people to make the letter for me, I just wanted advise.