Courses must be taken on a letter grade basis. This is a letter that your auditor will send out to third parties, such as banks or suppliers, asking them to confirm certain financial information.This report contains the results of our audit of cash and food stamp eligibility at the Allegheny. This is a letter that your auditor will send out to third parties, such as banks or suppliers, asking them to confirm certain financial information. When confirming bank balances, the bank confirmation letter is one of the strongest forms of evidence. The Allegheny County Health Department (ACHD) enacted Article XXI, Allegheny County Air. This Order shall be filed with the Prothonotary of Allegheny County in the Rules Docket. Random Eligibility Audit Results. During the course of our audit, we examined 152 out of 2,463 cases from the Allegheny. Judgmentally selected, and the sample for resignation letter testing was randomly selected.