Distinct specifics of "hdb customer stamp obligation one hundred forty 28" just isn't publicly obtainable, because the numbers likely stand for an tackle or inner reference quantity instead of a standard identifier. Consumer's Stamp Obligation (BSD) is really a tax levied on all property buys in Singapore, like HDB flats. https://hdb-buyer-stamp-duty-14021975.tinyblogging.com/hdb-buyer-stamp-duty-140-28-80972351