Dear Sir/Madam,
With due respect, my name is _________ (name) and I am working as a __________ (designation) at your reputed organization ___________ (organization) from the last _______ (months/years).
Courteously, I would like to state that my work permit will expire on __/__/_____ (work permit expiry date). In this regard, I request you to renew my work permit for _____ (no. of year/months/weeks/days/other).
I request you to kindly extend my work permit timely so as to avoid any future challenges. As per requirement, I am enclosing my ID proof/passport copy and the necessary documents required for further processing.
Thanking you in advance.
Yours sincerely,
_________ (Signature),
_________ (Name),
_________ (Contact details)