Tran Phuoc Vinh, 25. and Truong Van Tho, 24, both from Hue, were detained by Lam Dong police on July 1 for fraud.
Police said Vinh had previously served time for online fraud. After his release earlier this year, he moved to Lam Dong and teamed up with Tho to carry out the scam.
Since May, the pair allegedly created multiple Facebook accounts pretending to be bank staff and posted advertisements offering easy loans. Their targets were Vietnamese people living abroad who needed quick cash.
They forged documents and told victims to pay insurance and tax fees into intermediary bank accounts to secure the loans. After receiving the money, they cut off all contact.
Investigators said dozens of victims were defrauded, with total losses nearing VND1 billion ($39,000).