A delivery courier for a non-kosher restaurant

A young man in the process of becoming more observant works as a courier for Wolt. Sometimes he receives delivery orders from businesses that sell non-kosher food (prohibited food). Is he permitted to make such deliveries? And what should he do if he did not know in advance that the delivery was non-kosher food, and only discovered this when he arrived at the place?

Shalom u’vrachah 

Ideally, one should not undertake to make a delivery from a restaurant that sells meat and milk together, but if he was already sent there and discovered that it is a delivery of a prohibited item, he is permitted to transport the delivery. 

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