As the title says, this is an issue that's pretty annoying when performing license plate checks, as those characters look so similar in the ingame license plate fond.
I hope this is going to be adressed in one of the next releases.

I suggest one of the two following ways of doing so:

1. LSPDFR converts all detected license plates to a string where all "0"s are replaced with "O"s (or vice versa) and does the same with the user input, so it doesn't make a difference any more what you type in the console.
2. LSPDFR shows a list of all detected (checkable) license plates in the default UI font and thus makes it possible for the player to type in the correct one on the first try.

What do you think?
Is this doable, am I the only one having a problem with this, can you think of better ways of addressing this?

The license plate format never changes that I've seen. 40BMO098. The first two are always numbers, so like 4 0 (Zero) then three letters like B M O (Letter) then the last three are always numbers, like 0 (Zero) 9 8. So, basically whenever I read the license plates I automatically think, first two are numbers, then three letters, and then three more numbers. As regards to your topic, I think that would be a pretty good idea actually and would be helpful!

Well if what you say is correct, it is of great help to me!

I didn't even know there was such a thing as a license plate format in the US and/or the game.
In germany, we use a type of font called "FE-Schrift" (forgery-impending font), where no characters can be made to look like another one by using tape or paint, as well as a standardised format to avoid confusion and forgery.

I can also confirm the registration plate format is 11AAA111, except for the player vehicles' vanity plates. AI traffic do not spawn with vanity plates.