Primus Guaranty Ltd is calling its seven percent bonds due in 2036 and paying investors 100 percent of principal.The Bermuda-based company with offices in New York, which provides insurance against bond defaults, issued a notice of mandatory redemption of the senior notes on September 27, 2012.Primus said the notes “shall be redeemed at 100 percent of the principal amount thereof plus accrued interest to the redemption date, and interest on the senior notes will cease to accrue on and after the redemption date”.Investors with questions about the mandatory redemption are asked to contact Deutsche Bank Trust Company Americas, the trustee for the senior notes, at 1-800-735-7777.