# Sending Payments

> How to send private payments with Senddy.

Source: https://www.senddy.com/docs/using-senddy/sending-payments
Last modified: 2026-08-01T23:49:54.000Z

---

## How to send a payment

1. Open Senddy and tap **Send**
2. Enter the recipient — you can use:
   - A **Senddy username** (e.g. `alice`)
   - A **Senddy address** (starts with `senddy1...`)
   - An **Ethereum address** (starts with `0x...`) for withdrawals to external wallets
3. Enter the **amount** in USD
4. Optionally add an **encrypted memo** (only visible to you and the recipient)
5. Review the details and tap **Confirm**

## What happens behind the scenes

When you send a payment:

1. A zero-knowledge proof is generated on your device (takes 2-5 seconds)
2. The proof is verified by an attestor running in a secure enclave
3. The transaction is submitted to the blockchain — but only the proof is visible, not the details
4. The recipient's balance updates privately

Neither the amount, the sender, nor the recipient are visible on-chain.

## Pay links

You can also send payments by visiting someone's pay link:

```
senddy.com/pay/username
```

This opens Senddy with the recipient pre-filled. You can also include an amount and memo:

```
senddy.com/pay/username?amount=50&memo=dinner
```

## QR codes

Scan a recipient's QR code from the Senddy app to instantly start a payment. The QR code encodes their username and address.

## Fees

Payments between Senddy users cost less than $0.01. This covers the proof verification cost on-chain. There are no monthly fees, no percentage-based fees, and no hidden charges.

## Limits

There are no sending limits within Senddy. You can send any amount from your available balance.