A 2013 piece in ''The Wall Street Journal'' reported that the capitol building, which was "unsuited to the local climate", had put Palau in debt, and a fault in the ventilation system had recently caused a mold infestation. In April 2013, Ngerulmud's post office was closed permanently, as part of cost-cutting measures implemented by the postmaster, Tommy Sinsak. It had been established in December 2011, following an ''Olbiil era Kelulau'' resolution, and was one of only two in the country (the other being in Koror). During its 16 months of operation, expenses had exceeded US$30,000, while revenues, mainly from stamps, were less than $2,000. Ngerulmud is the only settlement in Palau to have its own ZIP code (96939), with the rest of the country using 96940 – the United States Postal Service services Palau as part of the Compact of Free Association with the United States.