10 years ago my thai girlfriend with whom I have a son purchased a house on installments from a developer with her farang boyfriend, after about 1 year of them making payments together my thai gf and her boyfriend split up and she continued making the payments on her own, now all of the payments are complete and the developer is saying in order to transfer the property to her name her ex boyfriend needs to sign some paperwork, the problem is she is unable to contact him to get the paperwork signed, I dont understand why the developer needs this paperwork signed as a foriegner can not have any property transfered into their name