Detailed Explanation
THE SCHNITZEL SHAM invokes the following laws.
1. When a defect in a sale is easily rectifiable (i.e. adding/subtracting an additional unit) the transaction is valid but the buyer may demand reimbursement for the difference [Choshen Mishpat 232:1].
2. A consumer whose defective merchandise is of such that when the defect is rectified it would not change or adversely affect the quality of the merchandise, may not annul the sale. Instead, he/she may require the seller to rectify the issue (and when appropriate duly deduct from the original sale price) [Choshen Mishpat 232:5, Nesivos 7].
3. Repairing the defect is the seller's responsibility. The consumer may annul the sale if the merchant does not fulfill his/her duty to repair the merchandise [Ulam Hamishpat Choshen Mishpat. 232].
4. Time-sensitive defects are not considered rectifiable after the time expires [Choshen Mishpat 232: Bach 4].
5. A merchant remains liable for merchandise en route to the consumer via the merchant's employee or courier [Choshen Mishpat 340:6].
Application
Hyman ordered schnitzels to be delivered to his bar mitzvah hall. The sale included the production of the food and the delivery. While The Schnitzel Place prepared the food, they delivered it to the wrong destination. Hyman encountered a time sensitive defect in the sale.
The Schnitzel Place has a small window of opportunity to re-deliver it to the correct destination. Otherwise, Hyman may demand a full refund for the food.
This applies even if The Schnitzel Place outsourced their deliver service to a third party. If however, the delivery service were to be employed by Hyman, Hyman is not absolved from paying The Schnitzel Place for the food.