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A plumber finishes a repair in a basement at 6pm. The homeowner is at work across town and wants to settle the bill by card before the weekend. The technician has an Android phone in his pocket and no card in front of him to tap it against.
Payments taken without the physical card are called card-not-present transactions, and they account for most card fraud losses in the United States, a share that reached 71% in 2024. About 40% of American phones run Android, so a large number of small operators take these payments on a device with no reader attached. The software for it is inexpensive and quick to set up. What the card networks require around it changed on March 31, 2025.
Keyed Transactions and the Authorization Path
A keyed payment travels the same card networks as a tap at a counter. The difference is in what the merchant can prove afterward. When a chip is inserted, the card itself signs the transaction with a cryptogram the issuer verifies. When a number is typed into a form, none of that happens. The issuer falls back on secondary checks such as the billing ZIP code through address verification and the 3-digit security code printed on the card, along with whatever risk scoring the processor applies.
Approval still takes a few seconds. Settlement follows on the processor’s normal schedule, usually the next business day. The paper trail is where the two methods part company. A chip transaction is difficult for a cardholder to disown later. A keyed one invites the argument, and the merchant absorbs the loss when a dispute succeeds.
Fraud Liability on Remote Payments
Those losses came to an estimated $10 billion in 2024, up from $9.5 billion the year before. The totals matter less to a one-truck operation than the liability rule behind them. In a remote payment the merchant usually pays for a successful dispute.
Chargeback rules give the cardholder months to claim a transaction was unauthorized. Without a signature or a chip reading, the merchant has little to submit in reply. Documentation fills that gap. A dated work order, a written estimate the customer approved, an email confirming the amount, and a photo of the completed job all become evidence once a dispute is filed. None of it guarantees a win. A dispute answered with dated paperwork still ends better than one answered with a memory of a phone call.
Payment Software Built Around an Android Phone
Three categories of software handle remote payments from a phone. An invoicing app sends a payment page by email or text and lets the customer type the card details themselves. A payment link generator does the same with a single reusable URL. A virtual terminal for credit card processing gives the merchant a form to key the number into directly, which is the option for a phone call where the customer reads the digits aloud.
Most of these run in a mobile browser rather than as a dedicated Android app, which removes any question of Play Store availability or version support on an older handset. Battery life and signal strength become the practical limits instead. A dropped connection partway through a submission can produce a duplicate authorization, so the habit to build early is checking the transaction list before resubmitting anything.
Card Data Handling Rules
PCI DSS 4.0.1 became fully mandatory on March 31, 2025, when 51 requirement specifications that had been treated as best practices turned into obligations. For a one-person business the applicable parts are narrow and firm. Card numbers cannot be written on paper and left in a van. They cannot be stored in a phone’s notes app, a text thread, or a camera roll. Multi-factor authentication is required on any account that reaches cardholder data, and passwords have a 12-character minimum.
A merchant who types a number into a payment form and keeps no copy of it anywhere has satisfied most of what applies. The failures are almost always storage. Someone builds a spreadsheet of repeat customers with full card numbers in it so the next invoice is faster to bill, and that spreadsheet becomes the entire liability of the business.
Cost Differences Between Keyed and Tapped Payments
Keyed payments cost more to accept. The interchange a merchant pays is a percentage of the sale, typically between 1.5% and 3%, plus a fixed fee of 5 to 20 cents. Card networks price that percentage partly on the security of the method, and keyed or card-not-present transactions are charged more than chip transactions because the fraud risk is higher. Rates move twice a year, in April and October, so the number a merchant agreed to in January is not permanent.
US businesses paid well over $100 billion in swipe fees last year on an average rate of roughly 2.33%, and a settlement announced in November 2025 would trim that average slightly while letting merchants refuse specific high-cost cards. A business taking 20 remote payments a month sees none of those totals. Method is what a small merchant controls. Send a payment link when the customer can open one, and keep the keyed form for callers who have no other option, since a customer typing their own card details also removes the merchant from the data-handling question entirely.
How to Set Up the Process Before the Next Job
Open the merchant account while there is no pressure on it.
Underwriting a new account takes anywhere from a day to two weeks, and a technician standing in a basement cannot wait out a review.
Decide next which method each kind of customer gets. Phone callers need a form the merchant fills in. Customers reachable by email or text should receive a link they complete themselves, because that keeps the card number out of the merchant’s hands altogether.
Write the amount down before dialing. Reading a total off an invoice while a customer reads digits back is how transposed figures and duplicate charges happen. Save the approval code against the job record afterward, where the next person looking for it will think to check.
The $1 Test Before the First Customer
Before any of this touches a customer, put $1 through the setup on your own card and refund it. The test answers three questions at once. The authorization goes through, the refund path works without a call to support, and the money arrives in the bank on the schedule the processor described rather than a week later.
Small firms were already waiting an average of 29.1 days to be paid, close to 10 days past their own terms, before anyone added a failed card payment to the delay. A method that breaks on first use costs a day when the customer was ready to hand over money. Run the $1 test this week. One dollar, your own card, refunded before the end of the afternoon.
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