This section is from the book "The Law Of Contracts", by William Herbert Page. Also available from Amazon: Commercial Contracts: A Practical Guide to Deals, Contracts, Agreements and Promises.
Notice should be given to the debtor or to his duty authorized agent.1 Notice may be given to the agent through whom his principal has been accustomed to receive notice,2 even if in the particular case he omits to forward such notice to his principal. Notice to a firm is sufficient if given to the bookkeeper in charge of the store, where the partners are all absent.3
If the notice is actually communicated to the debtor it is sufficient, even if given to another person to be communicated.4 Notice to one who is not a duly authorized agent is insufficient if the debtor does not actually receive knowledge thereof.5 If the debtor has paid the fund into court, notice to the clerk is insufficient.6