16109 contract law/ sale of immovable property/ property law/ immovable property/ Effect of contract on third parties Civil Code property law contract law volume 4 immovable property sale of immovable property effect of contract on third parties Federal supreme court of Ethiopia cassation decisions contract of sale የሽያጭ ውል በሶስተኛ ወገኖች ላይ ውጤት እንዲኖረው ተዋዋዮች ውላቸውን በመዝገብ እንዲፃፍ ከማድረግ የዘለለ ግዴታ የማይጥልባቸው ስለመሆኑ የፍ/ብ/ህ/ቁ. 1587 162ዐ 1613 2878 Cassation 16109