Why would organizations warning of voter fraud on billboards not identify themselves?

[Mr Khan]

HappySqurriel said:

Mr Khan said:

Standards in Pennsylvania demand a photo ID with an expiration date, which disqualifies certain forms of state and federal ID

What forms of photo ID are acceptable and which are unacceptable?

I personally can't think of any form of government issued photo ID that doesn't have an expiry date; because they usually force a 5 year (or so) expiry on these IDs to ensure that the Photo still looks like the person who owns the ID.

Generally what's on the chopping block are forms of identification that don't include photos or expiration dates. I believe Medicare cards are one, though my arm of the campaign wasn't involved in preparing voters (actually should be doing my job right now instead of writing this).