This section is from the book "The Law Of Contracts", by Theophilus Parsons. Also available from Amazon: The law of contracts.
1 An indorsement, in the handwriting of the debtor, but not signed by him, of a pay-ment of part of a promissory note, will not prevent the operation of the statute, if no money or other valuable consideration actually passes between the parties, even if the parties, at the time of the indorsement, orally agree that it shall be deemed to be a payment, Blanchard v. Blanc hard, 122 Mass. 558. -K.
In a recent case in England, a father holding a note against his son, computed the interest, and gave a receipt for it to the son's wife, as a present, the son standing by and being ready to pay it, but paying nothing; and the father indorsed the payment on the note; and this was held to be a part payment, taking the note out of the statute; but one of the judges of the Exchequer dissented, (tw)
It is clear that the payment cannot revive the debt, unless it be made by one who had authority to bind the debtor; thus, a part payment by a wife, without specific authority from the husband, does not revive the debt as to him.(u)1
 
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