I'm a Swiss national (Swiss German) and have been permanently living in Thailand since 1987.
Before I met my wife she had a son from someone she met only once and then vanished. Her son left us many years ago to lead his own life. After he left he had a liaison with a girl, had a son, then they split and she took his son with her on which he agreed.
About 7/8 years ago he got married with another girl with whom he had a daughter. Kanoporn (Amy) born on June 15, 2009. Less than 2 years later the couple divorced and his wife relinquished parental custody to him. Since he was not able to take care of his daughter, he asked beginning of April 2011 his mother (my legal wife, born Thai with Thai & Swiss citizenship) if she wanted to take care of his daughter. He said at that time that he would relinquish his parental rights to her, but that has so far not materialized. Of course, she agreed immediately and Kanoporn (Amy) entered our family on April 15, 2011, 5 years ago. Amy is extremely gifted. When she arrived at our home she didn't speak one word and only started to talk after she was 2 years old. We love her like our own daughter, we pamper her, she goes to a private school and speaks since about 2 years English fluently. Now my 2 questions:
Next year we would like to go all together on a three week holiday, 1 week to Switzerland and 2 weeks to Spain. In order to travel to Switzerland she will need a Thai travel passport. Do we need parental consent from her son to obtain the passport at the Amphur? I guess so.
The other important thing is to obtain a letter of consent from her son that Amy can travel with us. Is there an official form somewhere available to download?. Can you maybe explain to me how we should proceed. We know that Amy's biological father will sign any form we ask him to sign. That is not a problem.
We have her birth certificate and she is registered on my wife's tablien baan.
If anyone in the know can help, I would be very grateful. Thank you in advance!