We are regularly called in to troubleshoot access systems we didn't install.  We identify the issue and fix it to get it working as it was.  However whenever we are working on a door with a mag lock 9 times out of 10 it is wired improperly and not to code.  They are using momentary buttons wired to the RTE on the access panel, not using 2 means of egress, and just everything is wrong.  The customer typically is just happy that it is fixed but does not want to spend any extra money and could really care less about how we are telling them it should be done.  I touched it last so it's my responsibility.  I am looking for a document that I can just have the customer sign that they were made aware of the issues and wondering if this is something that is be used by anybody.  If it is job we sell then we have our standard sales contracts but we don't go through that process for service calls.