If the casket is not used at the destination burial ground, we send the remains in a Ziegler case.
A Ziegler case is a metal box which meets the minimum requirements of the Airline.
Most countries require authenticated death certificate from the respective Embassies or Consulates. These Embassies or Consulates require State and US level Apostille/Authentication in order to authenticate the death certificate.
In Texas Apostille is obtained from office of Secretary of State in Austin. Additional information is available in the Apostille (PPS) or Apostille (PDF) files.