Two payment routes operate, depending on what is being purchased.
Direct one-time purchases, currently the digital books, are processed by Stripe Payments Europe Ltd, an Irish entity regulated by the Central Bank of Ireland under EU e-money rules. You enter your card details on Stripe's hosted checkout page; Sovereign Minds never sees your card number, expiry, or CVV. Stripe sees the transaction, applies the correct EU VAT rate for your country, issues the receipt, and remits the net amount to my account. Card networks (Visa, Mastercard) and your issuing bank also see the transaction, as they would for any card purchase.
Peerage subscriptions and bespoke commissions are paid by bank transfer. An invoice is issued on acceptance of the enquiry, with my bank details and a unique reference. You transfer the amount; I begin the work or the delivery once the payment has landed. SEPA transfers within the eurozone usually arrive in one to three working days, or within seconds where SEPA Instant is available between your bank and mine. International wires take three to seven days.
The choice of two routes is deliberate, and worth naming. A card processor is the right tool for an instant low-friction transaction at small ticket size, particularly where the regulatory burden of collecting EU VAT across twenty-seven member states would otherwise fall fully on a sole proprietor. Bank transfer is the right tool for an annual commitment where the relationship is direct and the cadence is slow enough that a few working days of settlement does not matter. Forcing every transaction into one channel would be choosing one set of trade-offs over the other for reasons that are mine to manage rather than yours.
What I do not do, in either route, is correlate your purchase data across other surfaces. There is no analytics layer linking your transaction to a browsing identity, no advertising pixel, no enrichment data sold to brokers, no profile retained beyond what tax law requires me to keep.