> TLSv1.3 does not require the server to send any tickets if it decides not to. What makes it decide NO TO. Here I am particularly interested in OpenSSL implementation only. > In OpenSSL it is possible to configure the server to set the number of tickets that are sent - including down to 0. I understand that part that, my query was for any condition not in the user's hand. So let me rephrase - if openssl is configured to send one ticket by calling SSL_CTX_set_num_tickets(), is there a condition under which OpenSSL will not send session tickets?