Southwest Recovery Services, Inc. is a nationally recognized full-service accounts receivable management company headquartered in Dallas, Texas with offices in Houston, Austin, San Antonio, Oklahoma and St. Louis. We have more than 25 years of debt recovery experience, and we work tirelessly to get your company the money it’s owed. Debt Recovery and Collection Services Performance Guarantee. Our services are provided on a contingency basis with no out-of-pocket, up-front expenses to our clients. We fully guarantee our collection and recovery services because we do not get paid unless we collect!