Matt is right that you can't get back an acknowledged notification, however if you go into the My Records screen and click on the spanner icon in the top right of your record list, there is the option to show lots of optional columns. One of them (number 26 I think) is the date that the records were verified. Tick this, and then you can go to the top of that column and click to sort records by it. This will bring up the most recently verified ones to the top. Incidentally you can also add a column to show any verifier comments, but you'd probably want to deselect a few columns first to give this one some space.