If you happen to use Square (I'm sure the others provide this as well), you can simply create a payment URL that allows customers to add any amount. You can also add a custom field for "Invoice Number" so that info is captured with the payment. Add that URL to a button on your website and you're good to go! I use this for my tax/accounting clients who provide services so they can offer online payments to their customers.
Custom Payment
in Commerce
Posted
If you happen to use Square (I'm sure the others provide this as well), you can simply create a payment URL that allows customers to add any amount. You can also add a custom field for "Invoice Number" so that info is captured with the payment. Add that URL to a button on your website and you're good to go! I use this for my tax/accounting clients who provide services so they can offer online payments to their customers.