Hi, I have just completed Instructior led 401 training but I am not sure If I will get the certification voucher or not. Is that something you can clarify if I should wait for the voucher or not? If yes then when?

Hi, I have just completed Instructior led 401 training but I am not sure If I will get the certification voucher or not. Is that something you can clarify if I should wait for the voucher or not? If yes then when?

Is it necessary to enroll for an instructor led course to get the exam voucher or is there any other way also.
Help me..! I am new to the salesforce certification.
P.S. -> Company is paying for the exam.