New York state officials continue to look closely at methods used to sell retirement plans.

Principal Financial Group Inc., Des Moines, Iowa, says it has received a subpoena, or official request for information, from the office of New York Attorney General Eliot Spitzer about the marketing and sale of retirement products and services.

“Principal intends to fully cooperate with the inquiry,” the company says in a statement about the subpoena.

Principal also received a subpoena from Spitzer’s office in March.