Paypal
| Login to your Paypal Account. Click on Tools – All Tools |
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| Click on API Access. Click on Go To API Access |
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| Click on View API Signature. |
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| Click show next to each record. Login to the admin area, go t Application Settings - API Keys. Click on Paypal. Paste the 3 values there. |
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| You can leave the cancel and return URL empty. |