To determine if you or your client have the most up-to-date poster, there are 2 simple ways to check:

1. If you don't already have a QR code scanner on your phone, you can download a QR code scanner app for free. At the top left of the poster, locate the QR code and scan it with your phone. If the poster is still compliant, your phone will flash green and you will receive a message saying that your poster is compliant. If there have been mandatory updates to the poster, your phone will flash red and you will receive a message alerting you that there have been updates. If the client is on the E-Update Service, check to see if they have posted the relevant updates. If the client is on the Replacement Solution, check to make sure they have hung the latest poster they have received. 

2. Also at the top left of the poster, you will see a revision date. Go to posterupdates.com and check what is listed under the poster state in question. If the updates released since your poster's revision date have a "Yes" then they are out of compliance. If there is a "No," then your current version is still compliant.