Check that the banknote is genuine
Look, tilt, feel
When the banknote is held up to the light, the watermark, the head of an Atlantic puffin with the denomination 50, is visible. The Atlantic puffin motif is featured on all the denominations.
When the banknote is held up to the light, the security thread is visible as a dark line running through the paper. The security thread bears the text "NB" and the value of the banknote, 50, in small print.