Conversely, every state had concluded by the 1820s at least one treaty with some or all other members of the Confederation that detailed the deportation of undesirable persons without state citizenship and process of "implicit naturalisation". A German who resided in another state for at least 10 years was considered to have been naturalised implicitly in their new place of domicile. An implicitly naturalised father would have automatically passed his changed citizenship status to his entire family. In seven states, this process was extended to any alien who fulfilled the minimum residence requirement. These interstate treaties additionally clarified the position of persons with unclear status, who were granted the contemporary existing citizenship of their birthplace (if that was uncertain, then the place where they were found). Germans lost their state citizenship if they left state territory with the intent to reside elsewhere permanently, had obtained formal permission to emigrate, or otherwise continuously lived outside of their home state for at least 10 years.
