The unauthorised notes were smuggled through various African and European countries by air and presented for exchange in Belgium, Switzerland and the Gulf around June 1998, just as the upgraded 20-dinar note was being released in Bahrain. The large amounts raised suspicions and were soon detected as notes that had not been printed by the authorised printer, De La Rue. The Bahrain Monetary Agency allowed individuals who had mistakenly accepted the unauthorised notes to exchange them for face value at banks between 8-14 June 1998, then quickly recalled all 20-dinar notes on 30 July 1998. The unauthorised notes, being replicas of the 1993 design, were in purple and without a hologram. Despite this the upgraded notes, also in purple but with a hologram, that had been released in June 1998 were also withdrawn. On 1 August 1998 a new 20-dinar note, of the same design as the upgraded note (with a hologram) but in peach colour, was released. Thus, the genuine June 1998 design was only in circulation for about 7 weeks and is therefore rarely seen by collectors. All other banknotes of the Bahrain Monetary Agency remain exchangeable.