Provided is an apparatus and method for issuing a certificate by receiving in real-time a user's consent in an online or offline environment. The apparatus includes: a database unit storing and managing a list of certificates requiring a user's consent and personal information containing the identity and a contact point of the user of the certificates; a determiner, when issuance of a certificate is requested, receiving identity information of an applicant and determining whether the certificate requested by the applicant is listed in the certificate list stored in the database unit; and a consent inquiry unit, when the requested certificate is listed in the certificate list, transmitting the identity information of the applicant and the name of the certificate to a contact point of the user of the certificate, which is stored in the database unit, and inquiring whether the user consents to the certificate issuance.