The Ruling on Selling Goods by Description via Telephone and the Internet

Question:
This questioner asks about selling goods, Honorable Shaykh, by describing them to the seller, saying they are such and such, their description is such and such, their color is such and such, and their number is such and such, and then he buys them, as happens over the telephone or the internet or otherwise?

Answer:
It is necessary to know the item being sold, either by seeing it or by a description that matches it sufficiently for a salam (forward sale) contract. As for what is not the case, it is unknown, and it is not permissible to sell the unknown. Yes.