ATLANTA - One state lawmaker says there are thousands of uninsured or unregistered vehicles on Georgia's roads, and he wants to use technology to fix the problem. "Every year the Georgia Department of ...
MSN: Nevada DMV launches tool to report unregistered vehicles, but will people actually use it?
Nevada DMV launches tool to report unregistered vehicles, but will people actually use it?
So the adjective unregistered gives rise to the verb to unregister, although deregister would be more in line with convention. By this convention, unregistered should mean not registered (whether through active deregistration or never having been registered in the first place) and there should be no verb to unregister.
Some prescriptive grammarians would argue that the de- prefix should be used on verbs and un- should be used on adjectives. So, you deregister something and it becomes unregistered, or you deselect something and it is now unselected. The logic behind this is probably because de- only attaches to verbs to give the notion of reversal, so for the sake of order/non-redundancy/etc. you'd want un ...
In contrast, registration successful indicates that the process of moving from an unregistered state to the registered state has been completed. However, if there is more than one way to do this, you may need to define a separate message for each way, or put yourself in a situation where a single message is used for multiple ways.
A user who has registered but simply has not logged in would not be "unregistered". They would be "not logged in", and thus given "guest" rights.
It's really up to you (or your company) whether to include the ™ after every mention or after only the first mention, since including it once suffices to put readers on notice regarding the precise nature of the claimed trademark (unregistered versus registered) and since omitting it thereafter doesn't affect the legal force of the underlying ...