Western Sahara banknotes

Very random question. 

But has the territory of the Western Sahara ever had any history of using paper money?
It's not really an important thing, I just find it a bit weird to see my world map to see that the Western Sahara is devoid of any colour. 
 

There is supposedly a local currency used by one of the tribes there but is not recognized outside of the tribe as valid currency. Another member might be able to post a link to information but if you are clever with google, you should be able to find it.

I could be wrong here, but right up to 1976, they would have used the Spanish peseta currency and after that the Moroccan dirhams. With a population of 500,000+ I am sure they have coins and banknotes for daily transaction purposes.

I am just guessing here.

I researched this a few years ago and if I remember correctly, the majority of Western Sahara is de jure administered by Morocco, with only a small native population living in the area administered by Polisario Front ("Free Zone"), a strip of mostly barren land .  I believe that population has only limited use for currency, and that Mauritanian money is used for this purpose.  I don't think the coins or any other money issued by Western Sahara has ever actually circulated, but I could be wrong.

How about the Sahrawi peseta? A documentary I watched some time back talked about the Moroccan dirham, which is used in Western Sahara as Morocco has control over a substantial part of the region..