A 22-year-old man allegedly falsified bank transfers to scam people using Facebook Marketplace out of goods, including cars, motorcycles and electronics, Tasmania Police said.
The man, from Launceston, has been remanded in custody after allegedly using false pretences to obtain more than $200,000 worth of property.
Initially, the man was charged over a series of incidents relating to mobile phone sales on social media, but "detectives have since identified several further matters", police said.
Police allege within a period of six days, the man used false pretences to obtain cars, motorcycles, trailers, and electronic goods and that he "dishonestly obtained the property from people attempting to sell them on Facebook Marketplace, after presenting a falsified bank transfer receipt".
"This man reportedly doctored bank transfer receipts and claimed these were proof that payment had been made," said Detective Sergeant Luke Negri.
"People have then handed over the property in good faith, and the bank transfer has not occurred.
"Police would like to remind Tasmanians to be careful when buying and selling goods online. People selling items should ensure the payment has been received before handing any goods over to the buyer.
"People should also take further steps to confirm the identity of the buyer where possible."
The man will appear in the Devonport Magistrates Court at a later date.
Anyone with information is asked to contact detectives at the Devonport Criminal Investigation Branch on (03) 64784 036.
Information can also be provided anonymously to Crime Stoppers at crimestopperstas.com.au