According to The Real Estate License Act, only an owner or a licensed broker can sell residential property with few exceptions (see exemptions below).
A gentleman to whom I was showing a house told me he was going to sell his aunt's house for her. 
Selling property for a relative or a friend requires a real estate license - 
http://www.dumanlaw.com/newscol/reallic.html
"Practicing real estate without an active license is a criminal offense, 
specifically, a Class A misdemeanor punishable by confinement of up to 
one year in a county jail and a fine of up to $4,000.00. [TRELA 
§1101.756] TREC can also pursue administrative penalties not to exceed 
$5,000 for each violation.  Each day a violation continues can be 
considered a separate violation for imposition of the administrative 
penalties. 
[§1101.702 of the License Act]   The Commission may also 
issue a “cease and desist” order. [§1101.759 of the License Act]   
Finally, as a State Agency represented in civil court proceedings, TREC 
can obtain injunctive relief, including court costs and attorneys fees 
incurred in obtaining such relief. [TRELA §1101.751]" - Texas Real Estate commission Web site.
Exemptions:
an attorney at law licensed in this state or in an other state
an attorney in fact under a duly-executed power of attorney
a public official in the conduct of that person's official duties
an auctionier
a person acting under a court order 
Call a licensed broker to sell your house. Call me at 512-589-7988. Robin Scott, Broker
1015 Dogwood Trail for Sale in Cedar Park for only $249,900.
A one-story with a 
3-car garage! Open floorplan with an MIL for kids. Tons of upgrades plus refrigerator conveys. Master features dual 
vanity, garden tub, separate shower and walk-in closet. Near end of 
street with no through traffic, light and bright with a full sprinkler 
system and a covered patio. 1916 sq.ft. CAD, built in 2011. MLS# 6793386
http://www.tourfactory.com/1243018
Search for homes through Austin MLS.
Find your home's value.
Buying or selling? Hire an experienced professional. Call 
Robin Scott, Broker at 
512.589.7988.
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