GS1 Barcode Verification Services


Barcode is the key to product information. When it fails to scan alternatively, the numbers are entered manually. Incorrect entry of numbers may result in the customers being wrongly charged for the product they purchased or wrong goods being ordered or delivered. The worse scenario is there have been cases that when the barcode failed to scan the shipments were rejected.


GS1 Malaysia provides the verification service to ensure that Malaysian companies implement quality GS1 barcode on their product packaging. This verification service is available to all subscribers of the GS1 System under the GS1 Malaysia.  Passing the verification provides an assurance that the GS1 barcode will scan first time at all levels of the supply chain thus enhances the business relationship between suppliers, distributors, logistics providers and retailers.


Ensure Your Bar Code Can Be Scanned

There are many things that can go wrong in the production of a bar code after allocating the bar coded number and designing of the artwork. All of these can affect the scanning rate. Some of the factors that can affect the scanning would be:

  • Print Contrast

The print contrast verifies if there is sufficient contrast between the dark bars and light spaces. Sufficient contrast is essential for a good scan.

  • Size and Height of Bars

The bar code should be at least the minimum size that is recommended and the height of the bars should not be shorten.

  • Light Margin Area

Light margin area is the width of the space before and after the bar code. There should not be any writing or design too close to the bar code as the scanner will detect it as part of the bar code and will not be able to "recognise" where the bar code starts and stops.

  • Check Digit Calculation

Check Digit calculation serves as an accuracy check for the reading of entire symbol by the scanner.

  • Location of the Bar Code on the Packaging

Bar code symbols should be placed away from edges of packaging and on a flat surface. Recommendations on the preferred location of the bar code on the products have been drawn up. These guidelines are used to ease and quicken the checkout process. With some form of standardization of bar code location on the packaging, the cashier need not search all over the product for the bar code.


How Verification Differs from Scanning

Verification is the technical process by which a bar code symbol is measured to determine its conformance with the specification for that symbol. It tests the scan rate, bar codes specifications following the GS1 International general specifications and quality of the printed bar code. The only reliable way to predict how well a bar code will scan is to test the quality and the technical correctness of the bar code itself.

Scanners alone are not reliable as indicators on how well a bar code will scan because there are several types of scanners. Not only are there are different types of scanners but also different ages and conditions where a bar code may be scanned. The ambient light of a type of scanner will vary from others as will the distance of the scanning. Therefore a verifier is used to verify the specifications and quality of a bar code.

It is recommended that products’ packaging or labels should be in its final packaging when submitted for verification. This gives a more accurate result as factors such as shrink wrap, blister pack, creases or seams will be taken into consideration during the analysis.


For more information, please contact GS1 Malaysia at tel: 03-62867200 or email to