Is there a warranty on delivered work? — answered by Engineer Saeed Baatiah
Yes. Any fault in a function that was within the agreed scope is fixed within the warranty period stated in the contract at no extra cost. What the warranty does not cover: requesting behaviour different from what was agreed — that is a change, not a fault — or a failure caused by another party altering the system or hosting after handover. The distinction between fault and change is written into the contract explicitly to avoid later disagreement.