What makes you a buyer in good faith?

A purchaser in good faith is one who buys the property of another without notice that some other person has a right to, or an interest in, such property and pays a full and fair price for the same at the time of such purchase, or before he has notice of some other person's claim or interest in the property.[1] Corollary thereto, when a piece of land is in the actual possession of persons other than the seller, the buyer must be wary and should investigate the rights of those in possession. Without making such inquiry, one cannot claim that he is a buyer in good faith. When a man proposes to buy or deal with realty, his duty is to read the public manuscript, that is, to look and see who is there upon it and what his rights are. A want of caution and diligence, which an honest man of ordinary prudence is accustomed to exercise in making purchases, is in contemplation of law, a want of good faith. The buyer who has failed to know or discover that the land sold to him is in adverse possession of another is a buyer in bad faith.[2]

[1] De Leon v. Ong, 625 Phil. 221, 230 (2010).

[2] Rosaroso v. Soria, G.R. No. 194846, June 19, 2013.