Dear Yaping,
Thanks for the mail. I have just emailed a scanned copy of credit card authorized form to Mr. Shenchih Mai. Besides the great service from Zhang & Associates, I would like to express my appreciation particularly to Mr. Mai, who has provided tremendous support since Summer 2014. I will complete the survey shortly.
About the approval notice, the USPS regular mail is fine. Thanks a lot.
Best wishes,
Client
10/27/2015