ChargeOver might be a bit more popular than AP Center. We know about 1 link to it since March 2021 and only 1 link to AP Center. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
The college board will usually publish some old exams from many exams. You can check out their website https://apcentral.collegeboard.org for more information. Source: about 1 year ago
I work for a SAAS recurring billing platform, chargeover.com from my experience you do not need to send them an invoice. If they agree to terms when they signup you could just run a payment against their card on file and send them a payment receipt. It's a pretty slick deal, and there are loads of other options you could enable as well. But to your question it's more common than you think not to send invoices... Source: almost 3 years ago
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