It seems there is some issue in his/her application form so you need to send the correct documents to the office of CEE on or before the specified deadline along with a printout of the Memo.
For reference, you can go through the below link -
https://engineering.careers360.com/articles/keam-admit-card
Good Luck!!!
Eligibility | Application | Preparation Tips | Exam Pattern | Admit Card | Answer Key | Result
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile