Stellar is similar to Ripple, a network that supports issuing of assets and currencies.
The issuing account, which is the account which you have to create a line of trust with in order to utilise any of these assets, is GBHAQ252S4Z4AQOM4BWIRC3UHAOJIKCZQBUJGD336YH2O7W2NKRXMHA5
Please do NOT send these assets directly back to the issuing account, as that destroys them (basically it un-issues any that are sent back to it). Instead we use an issued-to account to which we initially issue these assets and from which we disburse them. If for some reason you wish to return any of these assets to us you may return them to the issued-to account, GATCAX6Q2TGGGU4Y7NJOSJCQ3SXZUWBTLJOKHKOK7LXZODXDJQCWXGX6
The issued-to account helps us keep track of how many of each asset we have issued onto the Stellar platorm, since the size of the trust line that it maintains with the issuing account is the number of units of the asset that we have issued on this platform. (We may well have, and indeed for many or most assets will have, issued those assets onto other platforms also, such as for example the Digitalis Open Transactions Server and the Horizon network.