Civil credit relationship s result from contracts, culpa in contrahendo,negotiontiorum gestio, unjust enrichment and torts, so do administrative credit relationship s.

• 正如民法债务关系主要因契约、缔约过失、无因管理、不当得利以及侵权行为而发生一样，行政法债务关系的发生原因也大致如此。