Washington state officials are ready to verify signatures for a proposed referendum on Washington state's newly expanded domestic partnership law. Secretary of State Sam Reed said Thursday that supporters of Referendum 71 turned in 137,689 signatures, about 14 percent more than the minimum needed to win a place on the November ballot. The average historic error rate is 18 percent. At least 120,577 valid voter signatures are needed to get on the ballot. Election workers will begin verifying signatures Friday.