Which method is NOT typically used to gain access to records?

In the context of gaining access to records, a letter of demand is generally not a standard method used to obtain records. A letter of demand is typically used in legal contexts to formally request action from another party, often concerning a claim or obligation, rather than a straightforward means to access records.

In contrast, requesting a formal subpoena is a legal tool used to compel the production of documents or testimony in legal proceedings. Utilizing a public records search is a common method for accessing certain types of government-held information or databases that are publicly available. Additionally, obtaining records through personal contacts might be used informally, but it often lacks the formality and legitimacy that a subpoena or a formal records request would provide. Therefore, writing a letter of demand does not align with the conventional methods employed to access records, making it the correct answer.