The countries that have legislation on surrogacy, and allow processes of surrogacy for single women , are divided into two groups, if we classify them by the type of filiation document of the baby that they issue:
Countries that allow surrogacy programs for single women , which issue a court ruling. (Example: USA and GREECE). In these countries, the authorities issue a court ruling, which grants you filiation. As the process has been supervised by a Judge, the Spanish authorities recognize you as a mother. Therefore, the child will be registered in your name, will instantly acquire Spanish nationality, and you will be able to travel to Spain without any problem.