An example apparatus may include a processor and a memory device including computer program code. The memory device and the computer program code may, with the processor, cause the apparatus to receive serialization codes for a first entity in a serialization flow; compare serialization codes for the first entity to serialization codes for a second entity, the second entity being either upstream or downstream of the first entity in the serialization flow; and validating the serialization codes from the first entity by determining if the serialization codes for the first entity are compatible with the serialization codes for the second entity in the serialization flow.