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switch/solo credit card add on

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I installed the 'switch_issue_cvv-v1.1' contribution today. Don't exactly understand the meaning/use of the 2 different checks (4 characters and 6 characters).

What is the difference if I use e.g. 'Accept VISA credit cards' and/or 'Accept Visa credit cards via original checks'? How am I supposed to set this?

I tried with a Visa and a MC the setting true/false, true/true and false/true with no noticable difference.

Somebody out there who can enlighten me a bit on this?



Gunter :roll:

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