Final answer:
If you receive an RFE while waiting for your EAD card, you can still mail the required materials while outside of the U.S., but consider delivery and processing time.
Step-by-step explanation:
If you receive a Request for Evidence (RFE) while waiting for your Employment Authorization Document (EAD) card and you are outside of the U.S., you can still mail the required materials to respond to the RFE. However, it is important to consider the time it may take for the materials to be delivered to the U.S. and for the U.S. Citizenship and Immigration Services (USCIS) to process your response. It is recommended to consult with an immigration attorney or the USCIS for specific guidance regarding the mailing of materials while outside of the U.S.