The first one sounds like a release, so they won't be held liable for any injury if you get hurt whilst working there.

The 2nd one sounds like what we call a "Police Clearance"in South Africa. It's like a letter or certificate from your local law enforcement agency confirming that you have not been convicted of any crime. (We had to get police clearanced to get our residene permits for Bahrain and Saudi. It wasn't very nice - we had to do it through our local police station in South Africa, and we had to have fingerprints taken. Made ME feel like the criminal LOL!!) I am sure yours will be easier though!