Can you explain? Do you mean Steam market transactions or does Dota2 have it's own system?
Any transaction on a Steam account.
Actual transactions (buying with credit card, paypal or other payment method):
- Retail games from Steam store
- Adding funds to wallet
- In-game purchases (dota, CSGO...)
"Semi-transactions": <- not an official name, made up by me to distinguish them from actual transactions
- Receiving a gift from another user
- Activating a CD key on your account
- Redeeming a wallet code (not sure where to sort it)
Market transactions are something else. Market is unlocked once you've made an actual transaction (semi-transactions don't activate the market).
To recall a Steam account you need to:
1. Provide purchase proof in case of an actual transaction (they ask for paypal transaction screenshots, last 4 digits of credit card and similar)
2. Provide game ownership proof in case of a semi-transaction. This includes providing the full CD key or wallet code, or purchase proof used to buy the gift.
3. Provide the original email used on the account
2 takes priority over 3, and 1 takes priority over both. Meaning that even though the seller provides the original email used on the account, they can still recall with purchase proof.
This is being abused in the Dota 2 forum A LOT. Sellers advertise their accounts as 100% safe by saying that they are providing the creation email, that there is no phone number or authenticator added etc. but they omit the fact that there are transactions on the account. Buyers are clueless about this.
In the last month, I was asked to MM 3 times for a Dota 2 accounts. All 3 deals did not go through because of this. Seller did not mention anywhere that there are transactions on the account and the buyer withdrew when I explained them.
Many scams happen due to this.