Untrusted updates

[anonprivate]

For the first time, I received an update that is untrusted - not verified by the author.

I have not installed it.

The icon is still in the the bottom panel.

What is the recommended advice?

If I 'quit the notifier', will it just return later?

Thanks

[Snowhog]

What ppa is the application update from?

[anonprivate]

I don't know.

Today's update (below) installed without a problem or messages.

Updates
Application Updates
NVIDIA X Server Settings Version 346.59 Oubuntu1~ubuntu14...
System Updates

I don't know if this was the same package as the previous update, but it looks familiar.