Taking payments with Muin Go
How payments work in Muin Go: Tap to Pay setup, payment types and receipts, other ways to pay, point of sale, cash, kiosks, offline rules and permissions.
Muin Go, the Muin app for iPhone, iPad and Android, takes in-person payments on a phone. This page explains how payments work in the app and what to set up. For the quick steps, see Take a payment on Muin Go.
When you’d use this
- You are deciding which phones and people will take payments.
- You want to know which receipt a payer gets and where the payment lands.
- You need to know what happens when the phone has no signal.
Devices
| iPhone | Android | iPad | |
|---|---|---|---|
| Tap to Pay | iPhone XS or later, iOS 16.4 or later | Phone with NFC, Android 13 or later | Not available |
| QR code, manual card entry, cash | Yes | Yes | Yes |
| External card reader | Yes | Yes | Yes |
Payers can tap a contactless card, Apple Pay, Google Pay or a smart watch.
Set up Tap to Pay
- Organization: an administrator connects card payments for your organization on the web.
- Device: on each phone, go to Home → Smart Payments → Terminal Settings and turn on Tap to Pay. Accept the Tap to Pay terms when asked. On iPhone, Apple shows its own terms screen the first time.
- Check it: run Settings → Payment Reader Check. Every line should pass: NFC hardware, NFC turned on, internet connection, card payments enabled for your organization, Tap to Pay terms accepted, Tap to Pay switched on for this device, and developer options, USB and wireless debugging off.
Terminal Settings also sets preset amounts, tipping, and whether a receipt email is required. To use a separate card reader, pair it in Settings → Payment Card Reader. Readers are listed on the web under Payments → Terminals.
Every payment has a type
Before charging, the operator picks what the payment is for. The type decides the receipt:
| Payment type | Receipt | Notes |
|---|---|---|
| Donation | Tax-deductible receipt | Choose a campaign or fund. Can be made recurring: weekly, monthly or quarterly. |
| Tuition | Payment receipt | Applied to the child’s tuition balance |
| Sale / Payment | Payment receipt | |
| Invoice Payment | Payment receipt | Pick an open invoice; the invoice updates when paid |
| Membership Dues | Depends on the membership | Opens membership enrollment |
| Event Ticket | Depends on the ticket | Opens ticket sale for an event |
| Pledge Payment | Tax-deductible receipt | Applied to the donor’s pledge |
The Confirm Payment screen shows the amount, type, allocation and whether a tax-deductible receipt will be issued before anything is charged.
Receipts
After a payment, the Payment Complete screen sends the receipt by email, text message or WhatsApp. The payer can add their name and email so the gift lands on their donor record, give anonymously, or give in honor of someone. Transaction History shows each payment’s receipt history, including voided and refunded receipts.
Refunds are issued on the web. See Refunds and disputes.
Other ways to pay
| Method | Use it when |
|---|---|
| QR Code | The payer would rather pay on their own phone, or your phone cannot do Tap to Pay. |
| Manual Card Entry | The card will not tap. You type the details on a secure page. |
| Cash | Cash in hand. Recorded for your books, with no card fees. For tuition, the same screen records a check, money order or Zelle payment. |
| Payment Links | You want to send a link to pay later. |
Point of sale and Quick Pay
- Point of Sale: on Collect Payment, switch to Products to build an itemized order with tax and discounts.
- Quick Pay: pick a preset amount and the payer taps their card or phone, for booths and events.
Cash collection
Home → Smart Payments → Cash Collection handles counted cash from a collection: two people count, an approver approves, returns it for recount or flags a discrepancy, and someone marks it deposited with a photo of the deposit slip. See Counting and depositing collected cash.
Kiosk mode
A tablet can run as a self-service giving or payment kiosk. Set it up from Set up this device as a screen on the sign-in screen, or Settings → Kiosk Mode on a signed-in tablet. See Kiosks.
Offline rules
| Action | With no signal |
|---|---|
| Card and Tap to Pay payments | Not available. Declined with a message, never saved for later. |
| QR code and manual card entry | Not available |
| Cash payments and quick-add donations | Saved on the phone, sent when you reconnect |
| Check capture | Not available. The check photo must upload. |
| Transaction history | Shows what was loaded before you went offline |
Card payments are deliberately never queued: a card charge saved for later would be a promise the phone cannot keep.
Who can do what
What a person can do follows their role on the web:
| Action | Needs |
|---|---|
| Collect a payment, Quick Pay, Cash Collection, Terminal Settings | Permission to process payments |
| Transaction History, Payment Links | Access to the Payments module |
| Recurring Giving | Permission to edit recurring payments |
| Start kiosk mode | Full access to payments |
What it affects
Every payment shows in Payments on the web with its type, campaign or fund, and receipt. Donations appear on the donor’s giving history and year-end statements.
When it goes wrong
- Payment Timed Out: the card was not detected in time. Tap Try Again.
- Payment Failed: no charge was made. Try another card or Try Another Way.
- “You must accept the Terms & Conditions before processing payments.” Open Terminal Settings and finish Tap to Pay setup.
- For NFC and reader problems, see Tap to Pay troubleshooting.