A. A vendor must keep a copy of the permit, any certificates, and bills or invoices to the purchaser for at least six years from the date the items or services are purchased. These documents must be appropriately marked to indicate that untaxed purchases were made. The words "purchased with D.P.P." satisfy this requirement.

(Updated: 2015)

This answer is intended to provide general information concerning a frequently asked question about a current position, policy, or practice associated with the taxes administered by the Connecticut Department of Revenue Services.  It may include an informal interpretation of Connecticut tax law by the Department of Revenue Services (DRS).  However, it is not intended to serve as a legal ruling.