I had to settle an estate with monies in seven countries. Not that much money for the most part. The deceased was a navigator for British Airways, GPS and computers have eliminated the need for his job these days. He flew all over the world and found it easier to have accounts in several different countries. Each still had money in them when he died. I learned how to obtain a death certificate, forward it to the proper person and arrange for or have arrange for me wire transfers. Then after all the money was collected I had to send part of it back over seas. British Airways was a great deal of help when ever I hit a stumbling block. Their retired benefits person was a fountain of information as I learned and it she guided me to several "lost" accounts and greased the wheels to get Old Joe's money.
So the point is that wire transfers are the way to go. Find a banker who understands what you need. One who has done ti before can easily deal with your problem.