Respected Sir/Madam,
Most humbly, this is to state that my name is ________ (name) and I am working as a ________ (designation) from the last ___ (years) in this establishment.
I write this email to formally request you for advance salary for the month of ________ (mention month). I need this advance amount for ____________ (mention reason for advance salary). I hope that you will understand my situation and support me in this.
Thank you in advance for your kind consideration. I look forward to hearing from you soon.
Yours Sincerely,
_____________ (Signature),
_____________ (Name)
_____________ (Contact details)