Follow the Rules ,they're not exactly rules but do consider them
1.Make sure you are actually using the right escrow and not a fake one.You know,these days its easy to get scammed by the fake impersonator escrows floating around the forum.
2.Most of the escrows have a pgp key mostly from keybase.Verfiy it here
https://keybase.io/3.Not sure if your trade is taking place here but suppose you have to buy a forum account from seller B (consider yourself as buyer A).You message one of the escrows if they're willing to escrow your trade,once they conform follow step 4.
4.You group message including the seller and the escrow with the terms of trade you had with the seller.Like in forum's account case ,potential activity : 250+,Staked message 1 year old,prince 0.12 etc
5.Once both the parties agree ,escrow will sign a message with his conditions IE buyer sends coins to xyz address after one conformation ,the seller has to send account details to the escrow. (the sign message generally has the info on his fees as well)
6.Escrow verifies the account details as stated in the point 4 and makes sure the details are accurate and as agreed upon.
7.You can ask any information about the account to escrow and he shall give in all the details .
8.The details are later sent to you to verify (meanwhile the coins are still with the escrow).Once you conform and change the account details,the escrow coins are released.
This is just an example of forum's account trade.Conditions do change depending on the volume and type of trade.
