Formula for Credit Card digits Checking

mianmazher

Active Member
Joined
Jan 24, 2004
Messages
412
Is there any way to check that the credit Card number entered in the cell is either VAlid or not ( I am asking abt the valididity of the Checksum not the validity of teh cRedit Card Number)(

I tyhink its teh Luhans Formula which uses MOD 10

Further more some cards have 16 Digits some have 14 Digits

Help Needed


Regards


Mian Mazher
 

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