The unregistered version of High Speed Verifier is almost fully functional. However, it has one limitation — it saves only first 5000 of the checked addresses. Also, we can provide only limited support (and with low priority) to unregistered users.

When you'll register, you'll get the registration key (serial number) which will remove the limitation. Your registration key will work for all future versions of High Speed Verifier (or we may provide you with the new key, if the keys will be changed for some reason).