Donorbox forms can collect donations in several different currencies. By default, it is set to US dollars ($), but there are other countries besides the US that also use dollars and the $ symbol for their currency (Hong Kong dollar, Canadian dollar, Australian dollar, etc). This can cause some confusion when a donor from one of these countries donates an amount, assuming it is in their local currency. The currency exchange rates are different, so they later find that they've donated either more or less than they intended to.
To fix this problem. you can set your Donorbox forms to show the currency symbol and code next to the preset amounts, as shown here:
To do this, simply follow these steps:
Log into your Campaigns Page and click the edit icon on the campaign you want to edit.
Click the 'Amounts' link under the 'Your Donation Form' header and select the option marked "Show currency code on the amounts."
The currency symbol and code for your selected currency will show next to each amount option on your form.