a plug of the Teachers Retirement System (TRS) of texas has been discovered. a retired principal learned that the TRS had mailed an envelope to her bank. Due to the window-style of the envelope, her personal information was clearly visible through the TRS envelope. The number of multitude affected by TRS's exercise is unknown. TRS changed their procedures so that content cannot live seen from the outside of the envelope. TRS also plans to read the sensitive information off of letters in the future.