Clarkson Laboratory and Supply Established 1928
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If your credit card declines and you need help purchasing or can't find the items you want, please e-mail sales@clarksonlab.net or call 619-425-1933 during business hours.

Business hours:
8:30 AM to 4:00 PM Pacific Standard Time (PST) Monday - Friday, closed Noon - 1:00 PM for lunch.
Closed Saturday and Sunday
 
Si tiene problemas con su tarjeta de credito al pagar, o si necesita ayuda para comprar y no puede encontrar los articulos que desea, favor de escribirnos a sales@clarksonlab.net o llamarnos al 619-425-1933.  Nuestro personal habla Español. 

Horario:
De 8:30 am a 4:00 pm PST, de Lunes a Viernes, cerramos de 12:00 pm a 1:00 pm
Cerrado Sábados y Domingos
 

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Understanding the Credit Card acceptance / declined process.
Credit card companies use various fraud detection security systems to verify that the card is being used by an authorized user.
Some of these methods include:
(AVS) Address Verification Systems
(CCV) Card Code Verification
Other hidden Fraud Alert Systems.
 
There are many reasons that your credit card may be rejected.
1. NON-USA Card issuing bank cards will be rejected.
    - You can use Paypal for NON-USA Credit Cards
2. You typed in the wrong Credit Card # or expiration date.
3. Billing address used is different from the Billing address on the credit card.
 
P.O. boxes will be declined contact us for assistance.
4. AVS is not supported by your card issuing bank.
5. Address information for cardholder is unavailable or not on file.
6. Lack of funds available on your account.
7. Gift Cards will be rejected since they have no AVS security features.
8. Your IP address is hidden, blocked or on a fraud alert list.

(AVS) - Address Verification Service
The Address Verification Service (AVS) is a security system designed to combat one of the most common forms of online credit card fraud. AVS compares the billing address information provided by the customer with the billing address on file at the customer’s credit card issuer. The payment gateway receives an AVS response code and then either accepts or declines the transaction according to configured security settings.

(CCV) Card Code Verification

A customer’s card code is a three- or four-digit security code printed on a credit card’s signature panel in reverse italics, or following the full number on the front of the card. Similar to AVS, Card Code Verification (CCV) compares the customer’s card code with the card code on file at the credit card issuer. The payment gateway receives the card code verification response code from the customer’s bank and either accepts or declines the transaction according to configured settings. Since the card code should only be known to the person in possession of the physical credit card, these additional numbers provide an extra measure of security against unauthorized credit card transactions.