@hamidsid-0: You said that you want to change your delivery address, but do you mean that you want to change it so that anything you buy from now on goes to a new address, or did you mean that you wanted to change it so that an item you've just purchased gets delivered to the new address? If you've moved house and wish to ensure that anything you purchase from now on gets delivered to your new address then follow the advice that has already been given on this thread and update your address details accordingly.
In the event that you've already purchased something but didn't realise that you had failed to update the delivery address on your account then you will need to contact the seller, explaining that you have moved house and wish to have the item delivered to a different address. If the seller has not yet sent the item out then it shouldn't be too difficult to sort out - the seller would just need to cancel the sale, citing "Problem With Buyer's Address" as the reason why, then once the sale has been cancelled the seller can then let you know. If you are still interested in purchasing the item then once you have updated your address details so then you can purchase the item again if the seller is happy to go along with this, as once you have updated your address details on your account then when you make a purchase the seller will automatically be provided with the correct address to post the item to once you make payment. That way, unless the item ends up being lost in transit, it ought to end up being delivered to your new address.
If you've purchased an item without updating your address details but the seller has already despatched the item then this is going to make things a bit more awkward. In that case both of you are going to have to hope that whoever receives the parcel doesn't decice to keep it, especially if it's a high value item, and is honest enough to scratch out the address that the parcel was delivered to, put something along the lines of "Not known at this address - return to sender" on the front of the parcel and then put it back in the post. If the seller has included an "If undelivered please return to..." address on the reverse of the package then he or she should eventually get it back again; however, if this is not the case then your item will probably end up being lost for good. In that case the seller may well add your User ID to his or her Blocked Bidders List, as he or she may not be willing to take the risk of the same thing happening a second time if you were to purchase the item again.
