Initially, the 29-year-old attracted sympathy as he was seen begging with swollen legs on the streets of Thailand. He claimed that his passport and money was stolen, reported AsiaOne.
Following the social media exposure, he was put up in a Bangkok hotel that a German Foundation had arranged for him.
However, he sneaked out from the room and was seen enjoying drinks and the nightlife in Pattaya.
Taxi motorcylists in Pattaya also claimed to have seen him show off more than Bt40,000 (S$1,570) when they recognised him.
One of the drivers was quoted as saying that he even asked them to fetch him girls, the website reported.
One hotel employee was also quoted as saying that the German was seen drunk.
This time around, when pictures of him enjoying the nightlife went viral, there was no sympathy, but anger that he preyed upon their generosity.
Tourist police have detained him.