(1)领地、封地的惯例

(2)封建法律和惯例集
12世纪成书于米兰的一部封建法律和惯例汇编，是该领域最古老的文献。在欧洲大陆一直被认为具有最高权威。

• certificate of completion
• certificate of conformity
• certificate of costs
• certificate of death
• certificate of deposit
• certificate of discharge
• certificate of election
• certificate of engineer
• certificate of entry
• certificate of good conduct
• certificate of graduation
• certificate of holder of attached property
• certificate of identity
• certificate of incorporation
• certificate of indebtedness
• certificate of insurance
• certificate of interest
• certificate of loan
• certificate of membership
• certificate of naturalization
• certificate of need
• certificate of occupancy
• certificate of participation
• certificate of partnership
• certificate of progress