Some consideration should always be stated in a deed. This shifts the burden of proving lack of consideration to anyone attacking the deed. To be sure the seal at the end of the instrument imports consideration and performs the same service, but it might inadvertently be omitted. The amount stated need not be the actual price paid. It may be nominal, as "ten dollars" or "one hundred dollars." This is usually done whenever the parties desire secrecy. There is however one important exception to this rule. When the seller is a fiduciary, the purchaser should always insist either on the deed stating the full, actual consideration or the seller giving a declaration signed and acknowledged, in form which may be recorded, setting forth the actual amount received. This for the reason that the fiduciary is not selling his own property and is bound therefore to sell only for a fair price, and the purchaser might subsequently be called upon to prove that fact.