Original degree certificate to my company for job security purposes - Degree certificate hold up

Hi friends, I have submitted my original degree certificate to my company for job security purposes. But I have not yet received any acknowledgement from them. When I ask about my certificate, there are not responding properly.
Please any one say what I should do.

Hi,
Employer is not supposed to collect Original certificate from employees.
Now that already you have submitted your original certificate with them try to get some proof from them about the submission of original certificate. Have they mentioned anything regarding in your appointment order. Please check.