Google Checkout is known to not support multiple currencies. If you are a UK based seller selling in USD this can become a problem, though a little hidden feature in WHMCS can solve this by processing payments in your Google Checkout accounts currency.
- Login your WHMCS admin control panel
- Navigate to: Setup -> Payments -> Currencies & add GBP (If you have deleted USD and added GBP as your default then add USD)
Currency Code: This is the code of the currency such as GBP for pounds or USD for US dollars.
Prefix: £, $ etc…
Suffix: GBP, USD etc…
Format: Leave this as it is
Base Conv Rate: This is the conversion rate for today (The difference between your default currency, you can find this out at xe.com)
- Navigate to: Setup -> Payments -> Payment Gateways
- Locate Google Checkout in the drop down menu and click “Activate”
Show on order form: Check this
Display Name: Leave this as the default “Google Checkout”
Merchant ID: This can be found in your Google Checkout account in the header of every page
Merchant Key: This can be found in your Google Checkout account in: Settings -> Integration
Convert To For Processing: Set this to the currency of your Google Checkout account (so if your account is UK based set this to GBP if it is US based set this to USD)
- Click “Save Changes”
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