Ghost in my local citations?

Alright, fellow digital marketers, I'm pulling my hair out here and could really use some collective wisdom. I just wrapped up an initial local SEO audit for a new client, and let me tell you, it's been an adventure.

The problem is, my usual citation audit tools (and even my manual checks on the major directories like Yelp, Yellow Pages, etc.) are showing wildly conflicting NAP data for the same business. It's like the local citations have a mind of their own, or a digital gremlin is having a laugh at my expense. One tool says address A, another insists on address B, and Google Maps itself shows a slightly different variant. I'm tearing my hair out trying to figure out which data point is actually 'correct' and, more importantly, how to establish a single source of truth for citation data accuracy. It feels like I'm chasing ghosts!

So, here's the burning question: How do you seasoned pros deal with these conflicting local citations? Are there any specific tools or methodologies you swear by to ensure you're working with the most accurate NAP data when everything else seems to be disagreeing?

Thanks in advance for any insights!