I got my account restricted

Good day,

My pal operates a crypto escrow service on telegram. About Three-Four days ago, he acquired $1,350 in USDT as part of a transaction between two parties, with him appearing because the intermediary.

After the transaction, the sender of the USDT raised a dispute towards the escrow wallet for the complete $1,350. To resolve the difficulty, my good friend already paid back the disputed amount.

At present, Binance is claiming that $500 USDT have to be deposited into the spot pockets from a third-party wallet as a so-called "service provider verification" collateral as a way to restore or unlock account entry.

Is that this a authentic Binance process, or is that this a rip-off? Can any Binance moderator or customer help representative make clear this?

Please somebody assist me relating to this challenge..