20 000 Rials

P#150A was introduced as part of the post-reform redenomination push, though Iran never fully carried through the conversion from rials to tomans at the note level — a recurring policy indecision that left multiple overlapping series in simultaneous circulation for years. The 20,000-rial denomination itself was a practical response to chronic inflation that had been eroding purchasing power since the early 1980s, accelerated sharply by international sanctions and oil revenue volatility.

The security thread specification on this series was upgraded from earlier 20,000-rial printings, making P#150A distinguishable from its near-identical predecessors primarily by that feature rather than any design change.