Tinker Card payments

by Samy (Kondasamy Jayaraman) · drawn with Colorfigures by April Zhu

Day 1, night (22:00) under your policy. Over 13 days Larkspur keeps €5,290.66.held €0.00 · charged €8,190.90 · Larkspur kept €8,156.06 · fees €19.27 / €1.91 / €13.66

Chapter 7 of 7

Set Larkspur’s checkout policy

Everything is on the bench: 3-D Secure, when to capture and the retry key, for small orders, drill presses and split baskets.

This chapter: Which checkout settings keep the most money without charging anyone twice?

About this chapter

You will learn

  • Different orders need different settings
  • Friction and fraud trade against each other
  • Why the best setting depends on the order

Words you’ll meet

Checkout policy
The settings for each kind of order: 3-D Secure, when to capture, and the retry key.

Step 1 of 2

Nobody may be charged twice, and stolen cards may cost Larkspur only a little. Then keep the most.

Set the best .

€5,290.66 kept CHARGED TWICE

No customer is charged twice, and Larkspur loses at most €50 to stolen cards; then keep as much money as you can.

Small orders

Small orders are cheap parts that ship the same day: a lost sale and a stolen card cost about the same.

Drill presses

A drill press waits for the supplier and ships on day 10, after a hold has lapsed.

Split baskets

A split basket ships what is in stock today and the rest within a week; some parts never come.

Each kind of order over 13 days
OrdersPaidLostTwiceFraudKept
Small orders231€0.00€26.76
Drill presses411€0.00€4,950.12
Split baskets311€0.00€313.78
All€0.00€5,290.66

Assumed: which customers give up when asked to prove it's them was written by hand: an assumption, not a measured rate.

A simulated day: Larkspur’s own orders, masked made-up cards and planning-number fees, not anyone’s real prices.