I'll also add that you should contact your merchant account provider or processor and get a "Merchant Category Code" assigned to your account. Stripe does this

I'll also add that you should contact your merchant account provider or processor and get a "Merchant Category Code" assigned to your account. Stripe does this too. Send a note to their support alias to say you need an "MCC" for your account (and tell them what to use) If you don't have one, many government and institutional "P-cards" (procurement cards, basically credit card numbers without the card, used to make A/P easier) will not allow the transaction. It's helpful to search in the "accounts payable" are of typical institutional client sites for "procurement card allowed" or "card policy". Extra hint: search those sample client sites for "5094", which is the code for "precious stones, metals, watches and jewelry", as that's likely to be a blocked merchant classification on most procurement card systems. "7297" (massage parlors) probably appears on the "no way, not gonna pay for that" list too. https://en.m.wikipedia.org/wiki/Merchant_category_code https://en.m.wikipedia.org/wiki/Merchant_category_code