The actual adoption was often operated like a business contract between the two families. The adopted child took the family name as his own. Along with this, the child kept his/her original name through the form of cognomen or essentially a nickname. The adopted child also maintained previous family connections and often leveraged this politically. Due to the power disparity that normally existed between the families involved in adoption, a fee was often given to the lower family to help with replacing (in most cases) the first-born son. Another case similar to adoption was the fostering of children; this effectively took place when a paterfamilias transferred his power to another man to be left in their care.