Real estate agents in Texas can work only on behalf of a licensed real estate broker. The sponsoring broker for Dolores L Preston is Roxanne Eichner Seibert (Real Estate Broker).
Real estate license needs to be renewed every 2 years. Sales Agents and Brokers need to complete atleast 18 hours of Continuing Education to become eligible for renewal. Dolores L Preston has successfully completed following courses as part of qualifying and continuing education. 
| Course Name (course number) | Course Provider | Course End Date | Hours | 
|---|
| Legal Update II (2020-2021) (37797) | Texas Real Estate Educational Systems | 2020-07-22 | 4 | 
| Legal Update I (2020-2021) (37796) | Texas Real Estate Educational Systems | 2020-07-22 | 4 | 
| Technology to Advance Your Business (36607) | Texas Real Estate Educational Systems | 2020-07-08 | 4 | 
| Contract to Closing: Solutions for Success (36606) | Texas Real Estate Educational Systems | 2020-07-08 | 6 | 
| Cloud CMA Unleashed (33132) | Republic Title of Texas, Inc. | 2019-09-19 | 3 | 
| Legal Update II (2018-2019) (33198) | Brightwood College | 2018-09-21 | 4 | 
| Legal Update I (2018-2019) (33197) | Brightwood College | 2018-09-21 | 4 | 
| Tour d' Real Estate: What Homeowners Want (33225) | Brightwood College | 2018-09-20 | 6 | 
| Millennials: Challenging the Traditional Real Estate Model (32077) | Brightwood College | 2018-09-20 | 4 | 
| Contracts - more than fill in the Blanks (30225) | Lawyers Title Company | 2017-11-09 | 6 | 
| Taming the Digital Dragon (29328) | Texas Real Estate Educational Systems | 2016-09-21 | 4 | 
| Broker Responsibility Course (27765) | Texas Real Estate Educational Systems | 2016-09-21 | 6 | 
| Legal Update II (29623) | Texas Real Estate Educational Systems | 2016-09-20 | 4 | 
| Legal Update I (29622) | Texas Real Estate Educational Systems | 2016-09-20 | 4 | 
| MOBILE TECH (24314) | MetroTex Association of Realtors, Inc. | 2014-09-10 | 4 | 
| TREC Ethics Plus (26400) | MetroTex Association of Realtors, Inc. | 2014-08-24 | 3 | 
| TREC Ethics Plus (26400) | MetroTex Association of Realtors, Inc. | 2014-08-24 | 1 | 
| TREC Legal Update MCE (26392) | MetroTex Association of Realtors, Inc. | 2014-08-24 | 3 | 
| TREC Legal Update MCE (26392) | Texas Real Estate Educational Systems | 2014-05-14 | 3 | 
| GUERRILLA MARKETING FOR TODAYS MARKET PLACE (25751) | Texas Real Estate Educational Systems | 2014-05-14 | 4 | 
| TREC Ethics MCE (26393) | Texas Real Estate Educational Systems | 2014-05-13 | 3 | 
| DON'T WHIZ ON AN ELECTRIC FENCE (25752) | Texas Real Estate Educational Systems | 2014-05-13 | 6 | 
| THE 3 T'S TO SUCCESS IN TODAY'S MARKET PLACE: TOOLS, TRENDS & TE (18954) | Champions School of Real Estate, LTD | 2010-09-30 | 9 | 
| TREC ETHICS MCE (E) (18650) | Champions School of Real Estate, LTD | 2010-09-29 | 3 | 
| TREC LEGAL UPDATE MCE (L) (18649) | Champions School of Real Estate, LTD | 2010-09-29 | 3 | 
| WHO DO YOU REPRESENT? (16397) | MetroTex Association of Realtors, Inc. | 2008-09-20 | 4 | 
| LAWFUL DISCLOSURE (16094) | MetroTex Association of Realtors, Inc. | 2008-09-20 | 4 | 
| TREC ETHICS MCE (E) (16497) | MetroTex Association of Realtors, Inc. | 2008-04-27 | 3 | 
| UNITED TEXAS: HOUSING INITIATIVES THAT WORK (15580) | Texas REALTORS | 2008-04-26 | 4 | 
| TREC LEGAL UPDATE MCE (L) (16496) | MetroTex Association of Realtors, Inc. | 2008-04-24 | 3 | 
| KEEPING CURRENT WITH TEXAS MORTGAGE LENDING (13490) | Alliance Academy | 2006-03-11 | 14 | 
| KEEPING CURRENT WITH TEXAS MORTGAGE LENDING (13490) | Alliance Academy | 2006-03-11 | 1 | 
| UNDERSTANDING THE MORTGAGE PROCESS AND A REALTOR'S GUIDE (13726) | 1 ON 1 LOAN TRAINING | 2004-09-22 | 9 | 
| UNDERSTANDING THE MORTGAGE PROCESS AND A REALTOR'S GUIDE (13726) | 1 ON 1 LOAN TRAINING | 2004-09-22 | 6 | 
| UNDERSTANDING THE MORTGAGE PROCESS: A REALTOR'S GUIDE (13159) | LANDAMERICA AMERICAN TITLE | 2003-10-23 | 15 | 
| PSYCHOLOGY OF MARKETING (523) | Lone Star College Tomball | 2003-10-01 | 30 | 
| REAL ESTATE MARKETING I (511) | CENTER FOR CAREER EDUCATION INC. | 2002-09-18 | 30 | 
| PROPERTY MANAGEMENT I (811) | Kaplan Real Estate Education | 2001-09-19 | 30 | 
| "ELEMENTS OF AN EFFECTIVE LISTING PRESENTATION" (11335) | INSPIRED SUCCESS | 2001-01-04 | 4 | 
| REAL ESTATE MARKETING I (511) | Kaplan Real Estate Education | 2000-06-11 | 30 | 
| LAW OF CONTRACTS (1200) | Kaplan Real Estate Education | 2000-05-28 | 30 | 
| LAW OF AGENCY (1111) | Kaplan Real Estate Education | 2000-05-21 | 30 | 
| LOAN AP, PROCEDURES, C/C (421) | Kaplan Real Estate Education | 2000-05-17 | 30 | 
| Principles of Real Estate II (112) | Kaplan Real Estate Education | 2000-05-14 | 30 | 
| PRINCIPLES OF REAL ESTATE  I (111) | Kaplan Real Estate Education | 2000-05-05 | 30 |