When it comes to license renewals where I work, we first try to reach the primary contact. If that fails, we try to contact whoever else we have on record. If that fails, we send snail mail. If that fails, then we give up.
At some point, the license will expire and the software will stop working. 90% of the time, this will result in an emergency call to our tech support, who will issue them a temporary (2 week, I believe) license and get the updated contact for who to reach to talk about a real renewal.
However, our customers are medium-to-large corporations and our software is system-critical for them. I'm not sure if this approach would be reasonable if your customers are normal human beings.
When it comes to license renewals where I work, we first try to reach the primary contact. If that fails, we try to contact whoever else we have on record. If that fails, we send snail mail. If that fails, then we give up.
At some point, the license will expire and the software will stop working. 90% of the time, this will result in an emergency call to our tech support, who will issue them a temporary (2 week, I believe) license and get the updated contact for who to reach to talk about a real renewal.
However, our customers are medium-to-large corporations and our software is system-critical for them. I'm not sure if this approach would be reasonable if your customers are normal human beings.