You can become a Deputy Borrower at the Gottesman Libraries at Teachers College by bringing a letter signed by your supervisor to the 1st Floor Information Desk of the library.
The letter must stipulate the length of time (usually one semester) that you will function as a deputy.
The letter must include the following information for both supervisor and deputy:
ID# from Back of ID
All items borrowed on the Deputy Borrower account become the sole responsibility of the Faculty Member or Administrator.
A student cannot be a Deputy Borrower for another student.
Teachers College faculty who wish to deputize someone to manage their Course Reserves can do so here.
Becoming a Deputy Borrower at the Columbia University Libraries is a separate process. See how here.