Frequently asked questions

A simple tool for creating invoices and emailing them to clients as PDFs, either from the dashboard or through a REST API.

No. Invoices are emailed as PDFs and you collect payment the way you normally do (bank transfer, crypto, cash, another service). Pay-now buttons are not part of InvoiceFlow.

No. There is no bookkeeping, expense tracking or tax reporting. Use it for invoicing, alone or next to your accounting tool.

USD, EUR, GBP and INR.

Sign up with an email and password. For 7 days you can send up to 100 invoices a day, with 1 API key and 60 API requests a minute. No card is needed.

Your data stays. You can still view and delete invoices, but creating and sending stops (the API returns 402) until you subscribe.

Each email sent: an invoice (single or in a bulk upload) or an e-signature request. Creating or editing drafts is not counted, and a failed send is refunded to your quota.

At 00:00 UTC every day.

Starter $10/month (500 per day); Growth $25/month (2,000 per day); Business $50/month (10,000 per day).

Yes. Yearly billing charges 10 months for 12.

Buying a different plan starts it straight away (there is no proration). Buying the same plan again adds time to your current period.

On the log-in screen choose "Forgot password", enter your email and we send a reset link that works once and expires after one hour. Changing your password signs you out everywhere else.

Yes. We email you a few days before your plan or trial ends, with a link to renew.

The invoice list shows a delivery status. If the recipient's mailbox does not exist or rejects mail, the invoice is marked bounced and we stop sending to that address to protect your sender reputation. Correct the address and send again.

Yes, from the Account tab. Export downloads your invoices, clients and settings as a file. Deleting your account removes your data after you confirm your password.

Bitcoin (BTC) and USDT on the TRON network (TRC-20).

Every open payment gets its own amount (a few cents of USDT or a few satoshis extra). That is how we match an incoming transfer to your account. Always send exactly the amount shown.

For Bitcoin, yes: wallets read the address and amount from it. For USDT there is no wallet standard for the amount, so the QR holds the address and the exact amount is shown beside it with a Copy button.

You have 60 minutes from when you open the payment screen. A countdown is shown.

Usually within a few minutes. Bitcoin needs the number of network confirmations we require (1 by default). USDT is detected once confirmed on TRON.

Those payments cannot be matched automatically. Email felicelse@gmx.com with your transaction hash and we will review it. Funds sent on the wrong network may not be recoverable.

Yes, by email, with a PDF and a link to the transaction.

We add no fees. You pay the normal network fee for your own transfer.

Open the API keys tab in your dashboard and press Create API key. Copy it immediately because it is shown only once.

Yes, per account per minute: 60 on the trial up to 1,000 on Business. Responses include remaining-request headers and a 429 includes Retry-After.

Not yet.

In the API reference.

"Your business name via InvoiceFlow" from our authenticated sending address. Replies go to your own email.

Ask them to check spam, and confirm you typed their address correctly. The email includes the PDF, which some strict mail systems scrutinise. Resend from the dashboard if needed.

To stop abuse and keep our sender reputation high for everyone.

Open the Bulk send tab, download the template, fill it in (one row per line item) and upload it. We check every row, show any errors and then send the invoices automatically.

client, email, description, qty and price are required. tax, currency, due, notes and group are optional. Rows with the same email, or the same group value, become one invoice with several line items.

They are listed with their line number. You can fix the file and upload again, or send only the valid rows.

Several invoices per second in the background. You can watch progress on the Bulk send tab. Sending an upload larger than your remaining quota is refused up front.

Yes. In the E-signatures tab choose "Upload a PDF", drag signature, date, name and text boxes to where you want them, and add one or several signers. They sign on your real document and you get the signed PDF with an audit page. Word files need to be converted to PDF first (see our free tools).

Yes, up to 10. You choose whether they all get the link at once, or one after another in the order you set. When the last person signs, everyone gets the completed PDF.

In the E-signatures tab, enter the document text and the signer's name and email. They get a secure link, draw or type a signature and agree to sign electronically. You both get the signed PDF with an audit trail.

Electronic signatures are recognised in many countries for many documents, but rules vary and some documents need other formalities. This is a simple signature tool, not legal advice. Ask a lawyer if the document is important.

Yes. Merge, split, compress, rotate, JPG to PDF, PDF to JPG, sign PDF and more are free, need no account and run in your browser, so your files are not uploaded. Tools that need extra software (Word/Excel/PowerPoint to PDF, protect, unlock, repair) run on our server when enabled, need a free login, and delete your file right after.

No. It is included in every plan and counts as one send per request.

Answer questions about the product, prepare a draft invoice from a sentence, open the bulk uploader, and prepare an e-signature request. It never sends anything itself: you confirm with a button.

It can make mistakes, so always check what it prepares. Do not share passwords, API keys or wallet seed phrases in the chat.

Yes, a daily allowance per plan (see the pricing table). It resets at 00:00 UTC.

Your account details, the invoices you create (including your clients' names and email addresses) and payment records. See the privacy policy.

See the refund policy. In short: crypto payments cannot be reversed, but we offer a 7-day refund window on a first payment as described there.