This article incorporates text from the public domain 1911 Encyclopaedia Britannica. Please update as needed.

BACK-BOND, or BACK-LETTER, in Scots law, a deed qualifying the terms of another deed, or declaratory of the purposes for which another deed has been granted. Thus an ex facie absolute disposition, qualified by a back-bond expressing the limited nature of the right actually, held by the person to whom the disposition is made, would constitute what in England is termed a deed of trust.