2010 Civil Law, Q16

X was the owner of an unregistered parcel of land in Cabanatuan City. As she was abroad, she advised her sister Y via overseas call to sell the land and sign a contract of sale on her behalf.
Y thus sold the land to B1 on March 31, 2001 and executed a deed of absolute sale on behalf of X. B1 fully paid the purchase price.
B2, unaware of the sale of the land to B1, signified to Y his interest to buy it but asked Y for her authority from X. Without informing X that she had sold the land to B1, Y sought X for a written authority to sell.
X e-mailed Y an authority to sell the land. Y thereafter sold the land on May 1, 2001 to B2 on monthly installment basis for two years, the first installment to be paid at the end of May 2001.
Who between B1 and B2 has a better right over the land? Explain. (5%)

Quick check

Under Article 1874 of the Civil Code, what is the legal status of a sale of land executed by an agent whose authority is purely verbal?

Under Republic Act No. 8792 in relation to Article 1874, does an authority to sell land transmitted via email satisfy the written authority requirement?

Why do the rules on double sale under Article 1544 of the Civil Code not apply when one buyer bought through an agent without written authority?

If an agent sells land under verbal authority and the buyer pays the full purchase price, what right does the buyer acquire over the land?

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What is the legal effect of an agent securing written authority via email after having previously executed a void sale without written authority?

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1. Written Agency Requirement
Under Article 1874 of the Civil Code, when a sale of a piece of land or any interest therein is conducted through an agent, the authority of the latter must be in writing. If the agent's authority is merely oral, such as a verbal instruction or phone call, the contract of sale executed by the agent is null and void ab initio. The requirement of written authority is mandatory to protect land ownership and prevent unauthorized conveyances of real property.

2. Electronic Written Authority
Under the Electronic Commerce Act (Republic Act No. 8792) and Article 1874 of the Civil Code, an email transmitted by a principal granting authority to an agent satisfies the legal requirement of written authority. Electronic documents and data messages carry the legal equivalence of written instruments under Philippine law. Consequently, a written authority sent via email legally empowers an agent to execute a valid contract of sale over real property on behalf of the landowner.

3. Double Sale Applicability
Under Article 1544 of the Civil Code, the rules on double sale apply strictly when two or more valid contracts of sale are made by the same vendor over the same property to different buyers. Where one of the sales is void ab initio due to the absence of written agency authority under Article 1874, no double sale occurs under the law. The buyer under the valid contract automatically holds a superior and better right over the void transaction.

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