Update, Nov 2009: I've just discovered and fixed a bug I introduced in the 2.2 branch for the IATS plugin. The bug was introduced when i updated the API files from IATS and failed to notice that the legacy method for C$ one-time donations was no longer supported. If you're using a version greater than or equal to 2.2.7, and are using IATS for C$, non-recurring donations, then you're affected . To fix it edit the file : CRM/Core/Payment/IATS.php, and remove the line that looks like this: $canDollar = ($params['currencyID'] == 'CAD'); //define currency type The full fix removes a conditional branch based on that value a little further on, but by removing this line, it'll never actually use that branch. Drop me a line if you have any questions. Update, May 2009: This post is still getting quite a bit of traffic, which is great. Here are a few important things to note: The IATS plugin code is in CiviCRM, you don't need to add any code. Y...