Hello tiszalina,
I have looked through the available Entities in IFC, but haven't found such a thing. What I found though was an attribute (of the ifcSite Entity) called 'LandTitleNumber'.
Here's the definition I found about it
on the Building Smart website:
LandTitleNumber
: The land title number (designation of the site within a regional system).
It is not mapped to anything by ARCHICAD, but you can enter a value for it manually in the Project Manager if you wish to use it.
I hope this answers your question.
Regards,
Daniel Alexander Kovacs
Professional Services Consultant
GRAPHISOFT
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