In addition to a valid identity document from your home country, the city of Leipzig only has one prerequisite for registering in Leipzig: a residence.
For this, you must be able to prove that you have somewhere you can live for an extended time in Leipzig. You can prove this to the authority by presenting an accommodation provider confirmation. You will find the form here.
If you have children, they also require a valid identity document or at least a birth certificate. If it was not possible to bring these with you, the child will be registered through the parent for the time being. Further steps will be discussed during the consultation.
If these documents have expired, this won’t be a problem for the initial registration. Further steps will be discussed during the consultation.