Page Comparison

...

Your OPT request has been approved. As the Student and Exchange Visitor Program (SEVP) has stated that digital I-20s will be permanently recognized, your OPT Request I-20 has been issued to you as a PDF file. Please find attached also a copy of your SEVIS Employment Information sheet.^*

Make sure to print and hand-sign in blue or black ink the "student attestation" section of the attached I-20 and make a single-sided, black and white copy of it to mail to USCIS for your OPT application if you will apply by mail. If you are e-filing (myUSCIS account registration required for first-time e-filers) , you may digitally sign it in blue or black ink using a stylus or other software pen tool in the app you are using to sign your scan your hand-signed I-20 afterwards to upload to your online I-765 application (make sure it closely resembles your actual signature, and choose a standard "stroke" (i.e., width)). Do not type in your name as your signature.

^*You won’t receive one if you have never been authorized for CPT or OPT prior to this application. If you have previously been authorized for CPT and/or OPT under a different SEVIS ID, it is your responsibility to gather documentation relating to those CPTs and OPTS and provide them according to the application filing method chosen (see end of section on Form I-765 Corrections for e-filing evidence submission procedure).

...

• Check your I-20 to ensure the OPT recommendation is on page 2.
• Use only USCIS' Form I-765 direct link to ensure that you download and file with the correct form edition.
• Check the fee amount on the USCIS website and make sure you are paying the correct amount.
• Include 2 passport-sized photos, taken within the last 30 days, in your application. You need to write your full name and I-94 number on the back of each photo if applying by mail.
• All handwritten sections on the I-765 must be written with a black pen. You cannot use a blue pen on the I-765.
• When signing page 5, sign your name by hand with a black pen and keep your signature completely within the box, without touching the lines. You cannot use digital/electronic signatures on a paper-filed I-765 application. 

Before mailing a paper I-765 application for OPT, it is your responsibility to ensure you've used the most recent version of the I-765 from USCIS' I-765 webpage

...