How can the process of taqabud (mutual possession/seizing) be carried out in a gathering with the money changer, knowing that the money changer does not transfer directly from our country, and he has a client in Dubai who transfers the amount to my account from a bank in Dubai, and the money changer does not know exactly when the transfer will be made?

For the exchange to be permissible, it is a condition to take possession of both counter-values. This possession can be tangible (physical) or constructive (legal). Examples of constructive possession include: bank credit by one party depositing money directly into the other party's account or via bank transfer, and the delivery of a certified check. If tangible or constructive possession is established, along with the regulations for currency exchange via telephone, then the exchange is valid; otherwise, it is not.