How to Send an Invoice: Checklist and Email Examples

Check the invoice, send it to the right billing contact, and record the next follow-up. Use the email examples below for the initial invoice, an overdue balance, a partial payment, and payment confirmation.

To send an invoice, confirm the recipient and billing details, check the amount and due date, then send a PDF or invoice link with a short email. Record when you sent it and what happens next. The job continues until the payment is recorded or the balance is otherwise resolved.

This guide includes copyable email drafts. They are examples to adapt in your email client, not built-in Corcava reminder templates or an automatic sending schedule. For the work after sending, use the invoice tracking walkthrough or the free invoice tracker spreadsheet.

1. Confirm where the invoice should go

The person approving the work may not process the payment. Before issuing the invoice, confirm:

• Billing entity: the company name and address the client expects on the document.
• Billing contact: the accounts payable email or person responsible for processing it.
• Submission method: email, a procurement portal, or another agreed channel.
• Required references:purchase order number, contract, project, billing period, or approved milestone.
• Agreed terms: currency, due date, payment method, and any deposit already received.

If the client requires a portal submission, emailing the project manager may not start their payment process. Keep the submission reference alongside the invoice number.

2. Check the invoice before sending

Use the terms agreed with the client. Do not add a new late fee, shorten the agreed payment period, or treat a deposit as unpaid when preparing the document.

For hourly work, reconcile the invoice to the time records before sending. 3 hours 30 minutes is 3.5 hours, not 3.30. Our time-to-invoice walkthrough shows a real demo with 5 hours 45 minutes at USD 75/hour: USD 431.25.

Starting from a blank document? The freelance invoice template covers hourly and fixed-price work. The consulting invoice template adds multiple consultant rates and expenses.

3. Send a short invoice email

Put the invoice number in the subject. Include the amount, currency, due date, and payment instructions in the body, even when those details also appear in the attachment.

Subject: Invoice [number] — [project or billing period] — due [date]

Hi [name],

Please find [attached / linked below] invoice [number] for [work or period].

Amount due: [currency and amount]
Due date: [day month year]
Invoice: [link, if used]
Payment instructions: [agreed payment method and reference]

Please let me know if you need a purchase order or any other information
to process it.

Thank you,
[name]

Choose either “attached” or “linked below,” replace every placeholder, and check that the attachment or link is present. If you use a payment link, check that it belongs to this invoice and reflects the current balance.

Send according to the agreed billing cycle or milestone. A client with a purchase order process may need supporting approval before payment can be scheduled; sending on a particular weekday does not remove that requirement.

4. Record the send and the next action

Add one row to the tracker when the invoice is issued. Record the invoice number, client, currency, total, due date, amount received, last contact, and next action date. Keep the original issue date when sending a reminder; re-sending does not create a new invoice.

The invoice tracker template calculates balances and overdue days from your entries. Update it when a payment arrives, and keep currencies separate when reviewing totals.

Use a cadence that fits the client's payment process. The following is a manual example, not a requirement to send every message:

Do not send another generic reminder if the client has already explained a disputed line or supplied a payment reference. Resolve that issue first.

5. Follow up on an overdue invoice

An overdue invoice has an unpaid issued balance after its due date. A draft is still awaiting issue, even if its planned due date has passed. Check the latest payment records before using this message.

Subject: Payment reminder — invoice [number]

Hi [name],

Invoice [number] for [project or billing period] was due on [date].
Our records show an outstanding balance of [currency and amount].

Could you confirm the expected payment date? If something is preventing
processing, please let me know so we can resolve it.

Invoice: [link or attached copy]
Payment reference: [invoice number]

If payment has already been sent, please share the date and reference
so I can match it to the invoice.

Thank you,
[name]

Keep the invoice number and original due date unchanged. If a correction is needed, record which version replaces the earlier document so the client does not pay both.

6. Acknowledge a partial payment and request only the balance

In our fictional Northstar Studio demo, invoice DEMO-002 totals USD 750. A USD 250 payment leaves USD 500 outstanding. Asking for USD 750 again would ignore the payment already recorded.

Subject: Invoice DEMO-002 — USD 250 received, USD 500 remaining

Hi [name],

Thank you for the USD 250 payment received on [date]. I have recorded
it against invoice DEMO-002.

Invoice total: USD 750
Payments received: USD 250
Remaining balance: USD 500
Original due date: 20 September 2026

Could you confirm when the remaining USD 500 will be paid?
The updated invoice is [attached / available at link].

Thank you,
[name]

These amounts are demo records, not a real customer payment. Replace them with the verified figures for your invoice. If you agree a payment plan, record the dates and amounts without losing the original invoice or payment history.

7. Confirm payment and stop reminders

Once the payment evidence matches the invoice and the remaining balance is zero, update the tracker and send a brief confirmation if appropriate. Here is a payment confirmation email; it does not replace any separate receipt your billing process requires.

Subject: Payment received — invoice [number]

Hi [name],

Thank you. We have received [currency and final payment amount]
on [date] against invoice [number].

Invoice total: [currency and total]
Total payments received: [currency and total received]
Remaining balance: [currency] 0.00

The updated invoice is [attached / available at link].

Best,
[name]

If payment remains unresolved, record the issue, the person handling it, and the next agreed action. Decide on any further escalation using your agreement and the facts of the case; do not automatically add fees or threaten to stop work in every reminder.

Sending and tracking in Corcava

Corcava connects the client, invoice, and payment records. You can review an invoice, use its send or re-send action, or share its public invoice link. The client-facing document shows the total, recorded payments, and amount due. Online payment options depend on the configured provider and invoice eligibility.

For a payment received outside Corcava, Record Payment on a Sent invoice accepts the payment date, amount, and notes. This records a payment already received; it does not charge the client or move money. Include the bank or payment reference in Notes when entering a manual payment.

A partial payment leaves the invoice Sent, with the reduced balance. Recording the full remaining amount closes it. Because an invoice can also be closed manually without a payment, verify the paid amount and payment history rather than relying on the Closed label alone.

The invoice screen supports re-sending an invoice. It does not provide a native timed overdue-reminder schedule or the editable email sequence shown in this article. Use the screenshot walkthrough to follow the actual controls and see how a USD 750 invoice becomes USD 500 outstanding after a partial payment.

Before you hit send

• Correct billing contact and submission channel
• Unique invoice number and agreed client details
• Work, quantity, rate, and total checked
• Currency and exact due date shown
• Prior payments deducted from the requested balance
• Working attachment or invoice link included
• Agreed payment instructions and reference included
• Send date and next action recorded

Then keep the invoice tracker current: an invoice sent, a promise to pay, and a payment received are three different events.