Some people are experiencing a problem during submission of their DV lottery DS260. They get a message that says “CASE NUMBER DOESN’T MATCH WITH THE CASE NUMBER”
In that case the following fix has worked for some people.
Where you enter your case number, remove the leading zeros. So – where the case number is for example 2018AF000012345 , you would enter 2018AF12345. Try that – it should then work.