Solicited refers to approaching someone with a request or an appeal. And unsolicited indicates the inverse: not approaching with a request or appeal. That's all there is to it. So, once again, a solicited application letter is one that was asked. An unsolicited application letter isn't one that was not asked for. Let's take a look at some examples of each type of application letter: A solicited application letter would be one that follows a specific format and uses specific language when making an appeal or requesting information. For example: "I am writing to apply for the sales representative position available at [company name].[address]. I understand that if selected, I will be provided with additional information about their company and program." An unsolicited application letter would simply include your resume without any follow-up or appeal. It wouldn't reference any particular position but might include a general statement about why you are interested in the company.