Which form would you use for record-keeping of accountable mail?

The appropriate form for record-keeping of accountable mail is the PS FORM 3849. This form is specifically designated by the United States Postal Service for handling accountable mail, such as registered, certified, or insured mail. It is used to communicate to the recipient that they have a piece of mail that requires their attention, typically because it cannot be delivered directly to them without their signature.

This form serves several important functions: it helps track the delivery attempt, provides the details of the mail item, and informs the recipient of the need to claim their accountable item at the post office. Properly utilizing this form is crucial for maintaining accurate records and ensuring that accountable mail is handled in accordance with postal regulations.

The other options do not serve this specific purpose related to accountable mail record-keeping. For example, DA forms are used primarily within the Department of Army processes, and while they may be relevant for various military administrative functions, they are not specifically tailored for postal services or accountable mail. Thus, PS FORM 3849 stands out as the correct choice for this purpose.