No matter how big or small your organization is; every business needs customer to sustain in the market. Most companies spend a significant amount of money on advertising and marketing in efforts to reach potential customers. Instead of wasting huge amount of money on rather futile marketing methods such as TV advertisements and hoardings, companies can use direct marketing to specifically promote their products and services to those who may be interested in the offer, and are authorized to make financial decisions. Direct marketing involves using direct communication modes such as e-mail, telephone, SMS, and the likes; the motto is to inform all prospective customers about the company’s products and services.The biggest challenge most marketers face is to find prospective customers. If your company requires a continuous flow of leads, you may hire a team of professional list generation executives. However, if your requirement is limited it is advisable that you avail the services of professional mailing list brokers. List brokers are privately owned firms specializing in searching various databases and finding potential customer for every industry. These companies use various databases and web based platforms such as LinkedIn, Facebook, etc, to find the people who are or may be interested in the services or products offered by your company.You need to keep a few factors in mind when purchasing a mailing list. The foremost thing to consider is the credentials of prospective customers your marketing campaign requires. Every bit of data costs; be absolutely clear about the fields you want to have in the list. You should select the fields based upon the means of communication you plan to use. Another very important thing to check is the date on which the list was generated or last updated; this is extremely critical as outdated leads may turn out to be useless for your company’s marketing campaign. People often change their contact numbers, e-mail address, physical address, and some even request to be taken off the mailing list; updating the list ensures that all such changes are updated.