Deeds registration is a land management system whereby all important instruments which relate to the common law title to parcels of land are registered on a government-maintained register, to facilitate the transfer of title.
Australia, Ireland as well as most Canadian provinces have converted from deeds registries to Torrens titles.
In Hong Kong, the vendor is generally only required to prove his title up to 15 years prior to the date of the sale and purchase.
For example, the vendor can rely on assumption that a recital of an instrument referring to matters prior to 15-year-old is true.
In Ireland a vendor has to produce "a good root of title" (usually a conveyance for value but some other instruments qualifies).