请问stem ext pending I-9 verify一定需要纸质I797么？

刚才查了一下USCIS的官网上有关 stem opt ext 的I－9填表说明，是不是有更新的i20就可以verify I-9的意思？
https://www.uscis.gov/i-9-central/744-f-1-stem-opt-extension


If the student presents an expired EAD and an endorsed Form I-20 recommending a STEM extension, the employer should enter the following information under List A in Section 2:

EAD document title;
EAD document number;
Date the EAD expired in the expiration date space; and
“180-day ext.” in the Additional Information field.

The expired EAD with an endorsed Form I-20 is acceptable until USCIS makes a decision on the student’s application, but for not more than180 days from the date the student’s initial OPT EAD expires. Employment authorization must be reverified after 180 days from the date the EAD expires to continue employment.

Acceptable Forms I-20 for STEM OPT students must have all Employment Authorization fields completed. These fields include: employment status, employment type, start and end date of employment, and the employer’s name and location.

不记得在哪篇帖子上看了说需要Receipt好像是以前的要求，不过为了保险我上个月入职除了过期EAD和I20之外也把Receipt扫描件发给公司了