Guides
Clear answers to payment and business questions.
Create a payment link
Prepare your request, share a link or QR code and check your customer’s payment.
Payment processing systems
Understand the parts of a payment system and choose how customers will pay.
Stripe alternatives
Compare Stripe and Trolleys on payment links, features and costs before switching.
How to improve a mobile checkout experience
Run five mobile checkout tests to find form errors, confusing payment returns and duplicate-payment risks, then decide what to fix.
Cart abandonment vs. checkout abandonment
See the difference between cart and checkout abandonment, calculate both from 100 shopping journeys and choose what to investigate.
Consuming webhooks reliably
Verify and save payment webhooks, match them to the order and recover from duplicate or interrupted processing.
Designing payment API retries with idempotency
For payment developers: handle a lost response, retain the original operation and decide whether to retry or investigate.
What is a chargeback?
Understand refunds, dispute fees, prevention and the records that help you respond.
How 3D Secure works
Understand frictionless authentication, shopper challenges and the payment result you must check before fulfilling an order.
Account takeover fraud: warning signs and response
Recognize suspicious account changes, distinguish them from ordinary activity and respond through the account provider’s recovery process.
Invoice management tips for small businesses
Keep invoices, part-payments and reminders accurate, from agreeing the work to recording the final payment.
Invoice discrepancies: find the mismatch and resolve it
Match a disputed invoice to its supporting records, identify each error and agree on a documented correction before updating the amount.
B2B payment methods: choosing how to pay and get paid
Compare business payment methods and follow a $2,400 supplier payment from approval to invoice matching.
What is an ACH debit?
Understand who starts an ACH debit, what authorization covers and what to check before collecting a bank payment.
EDI payments: how EDI differs from ACH and EFT
Separate EDI payment messages from ACH and EFT, then match a payment to the invoices it settles.
How to choose payment methods for a new country
Match payment methods to customers in a new country, then check eligibility, recurring use, refunds and the full customer journey.
BIC and SWIFT codes: what payment instructions mean
Distinguish BIC, account and invoice fields, then verify a supplier’s changed bank instructions before sending payment.
What is a profit and loss statement?
Read a monthly profit and loss statement, follow the calculation to $4,000 net profit and see why profit differs from cash.
How to read a balance sheet
Read assets, liabilities and equity through a $30,000 balance sheet, then distinguish working capital from available cash.
Credit card interest: how it is calculated and why it matters
Follow a daily-balance interest calculation and see how payment timing, grace periods and account terms affect the cost.