Some sellers require Fully Funded DLC.

What's the difference between that and the common DLC?

Also, some sellers require unconditional DLC. Does unconditional DLC mean that the seller will be able to cash the DLC regardless of whether he is able to meet the specified conditions of the the DLC? I question the seller and he say it's not like that. He say unconditional in this case means the buyer cannot change the terms of the DLC such as from revolving to non-revolving etc.

Is this true?