Signed {{ common_name }} ({{ cert_serial_hex }}) This is simply to notify that certificate {{ common_name }} with serial number {{ cert_serial_hex }} was signed{% if signer %} by {{ signer }}{% endif %}. The certificate is valid from {{ builder.begin_date }} until {{ builder.end_date }}. {% if overwritten %} By doing so existing certificate with the same common name and serial number {{ prev_serial_hex }} was rejected and services making use of that certificate might become unavailable. {% endif %}