Yes. The terms of all promotional contracts are subject to + or – 10% over-runs. If you ordered 500 plastic credit card cases and you receive 515 you will be expected to pay for the extra 15 cases. Orders can be specified for exact quantities but a fee of between $15.00 and $25.00 is usually charged. It has been our experience manufacturers do not abuse this, and any over-runs that are produced are reasonable to the quantity ordered.