Renewal of passport : have not heard from the mother since the divorce

It’s time for my daughter to renew both passports, Thai and USA. Obtaining a signed consent form to show the passport authorities, from the mother, is my aim. I was told by the government authorities to utilize social media in an attempt to make contact. I have not heard from the mother since the divorce in 2007.

Update: Mother re-surfaced after living in Japan for 10+ years. The Thai passport authority helped me make contact with her as she had recently returned some three months prior(Sept/Oct 2018. Was able to liaise, Mom and daughter got to meet up, and the paperwork was sorted.

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