Putting my Expiring Domain in Back-ordering site is Risky ?

I mean By many Backordering sites Runs Auction for Domain. Suppose I've found an Awesome Expiring domain and then Put it on Backordering site to Backorder ASAP. In between, there is a chance that Backordering leak my Domain to Other User too? So, That they become interested in My domain and Domain goes to Auction rather than my Pocket?