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.
I hereby acknowledge that I have this day purchased, at public auction, all that [describe property], for the sum of ---------dollars, and have paid into the hands of X. Y. (the auctioneer) the sum of --------- dollars, as a deposit and in part payment of the purchase money; and I hereby agree to pay the remaining sum of---------dollars unto A. B. (the vendor), at---------, on or before the--------day of---------, 19_; and in all other respects, on my part, to fulfill the annexed conditions of sale.
In witness whereof, etc.
See references under Sec. 3800.