People can lose their account to scammers by phishing attacks, or viruses.

- Vote for my team scam.
- You been invited beta/playtests scam.
- I sent you something scam.
- Sharing account with others, or person sharing with fell for one of the scams using your account.
- You login on compromise device such as public library, or cybercafe PC.
- Using sketchy private scam networks such as proxy, or VPN services.
- Using gambling/trading sites.
- Fell for DM scam claiming reported you/you have pending ban, or claiming to be support/admin.
- You were doing ARRR stuff, or download random things online, or from someone email/DM such as discord.

You can see login history of location visit steam help page > my account > data related to my account > steam logins. Note scammers can sit on your account for months before doing anything.

I recommend start doing this.
1. Scan for malware. https://www.malwarebytes.com/
2. Change password for all accounts using same password.
3. Deauthorize all other devices. https://psteamproxy.yuanyoumao.com/twofactor/manage
4. Generate new backup codes. https://psteamproxy.yuanyoumao.com/twofactor/manage
5. Revoke the API key. https://psteamcommunity.yuanyoumao.com/dev/apikey <--- Should be nothing there.

If the trade is over 7 days old there nothing you can do.
https://psteamhelp.yuanyoumao.com/en/faqs/view/365F-4BEE-2AE2-7BDD

the only advice i can give to u is to have ur steam guard on the phone so that way u need to accept manually every trade ur acount want to do ;)

引用自 Daniper04：

the only advice i can give to u is to have ur steam guard on the phone so that way u need to accept manually every trade ur acount want to do ;)

Always turn on but at the moment of trade, no notification. At least there is a bright side: no need to play CS or Dota anymore since I have nothing left.

引用自 Daniper04：

the only advice i can give to u is to have ur steam guard on the phone so that way u need to accept manually every trade ur acount want to do ;)

That if want to bypass hold restrictions.

Trade can be committed, but place on hold for 2 weeks, unless you're friend with the scammer account for over a year, which reduce trade hold to one day.

Also to point out again, there recent added trade protection, which if trade was finalize, and it gone beyond 7 days that the trade was completed there no way to revert trade.
https://psteamhelp.yuanyoumao.com/en/faqs/view/365F-4BEE-2AE2-7BDD