The summary.
A SUCCESSFUL PAYMENT DOES NOT MEAN YOU HAVE THE MONEY
Authorisation reserves funds; settlement moves them, possibly days later, net of fees and any rolling reserve.
FOUR THINGS DEFINE ANY PAYMENT METHOD
Speed, reversibility, cost, and who bears fraud risk. Establish all four before accepting it.
PUSH PAYMENTS DOMINATE HERE, AND THEY ARE GENERALLY FINAL
Which means a defrauded payer has far weaker recourse than a card user elsewhere — so confirmation and verification before sending matter more, not less.
RETRY SOFT DECLINES ONLY, AND NEVER IMMEDIATELY
Retrying hard declines damages your standing with the issuer, and rapid repeated attempts look like attack traffic.
MOST PAYMENT LOSS HAPPENS BETWEEN INITIATION AND AUTHENTICATION COMPLETION
Measure the completion rate at each step, not only final success.
REFUNDING A BORDERLINE CASE IS USUALLY CHEAPER THAN WINNING A CHARGEBACK
You lose the fee, the goods and the ratio either way. And exceeding scheme dispute thresholds triggers penalties and can end card acceptance entirely.
CALCULATE EFFECTIVE COST: TOTAL CHARGES OVER TOTAL COLLECTED
It is the only figure comparable between providers.
