The Mexican Mining Registry SIAM web address has changed. This is where you can check the ownership of concession titles. It used to be on the address http://200.77.231.71/siamweb/security, but that doesn't work anymore. They must have updated their DNS record because the address now is:

http://www.app.siam.economia.gob.mx/siamweb/s...cargaAviso

You can have this added into one of the stickies as well.