In real estate transactions, when the Sertifikat Tanah (Land Deed) is changed in the name, Notaris (Administrative Scrivener) prepares Akta Jual Beli (Certificate of Land Transfer) to certify the transfer of ownership, but prior to that, when the transaction is concluded between the seller and the buyer, the buyer pays Tanda Jadi (Contract Money) or Uang Muka (Advance Money) to the seller and Perjanjian Pengikatan Jual Beli (Reservation Agreement PPJB) is prepared.