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Sinosend automatically generates a PDF invoice for every charge to your account. You can download past invoices, update your payment method, add a VAT ID for tax purposes, and change the email address where billing documents are sent — all from your account settings.

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Find your invoices

1

Open Billing Settings

Log in to your Sinosend account, click your avatar in the top-right corner, and select Account Settings. Click Billing in the left sidebar.
2

Open Invoice History

Scroll down to the Invoice History section. You’ll see a table listing every charge, with the date, amount, plan, and status (Paid, Pending, or Refunded).
3

Download a PDF receipt

Click the Download icon next to any invoice to save a PDF receipt to your device. Each PDF includes the invoice number, billing period, itemised charges, your billing address, and any applicable tax.
Need invoices for accounting or expense reporting? You can download multiple invoices individually. Bulk export is available on the Business plan — click Export All at the top of the Invoice History table.

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Update your payment method

1

Open Payment Methods

In Account Settings → Billing, click Payment Methods.
2

Add a new card

Click Add Payment Method. Enter your card number, expiry date, and CVC. Sinosend accepts all major credit and debit cards, including Visa, Mastercard, and American Express.
Payments are processed securely by Stripe. Sinosend never stores your full card number — only a tokenised reference is retained on your account.
3

Set as default

After adding the new card, click Set as Default. Future charges will be billed to this card. You can remove the old card once the new one is confirmed.
If a payment fails, Sinosend retries the charge over the following 3 days. If all retries fail, your account is downgraded to the Free tier. You’ll receive an email notification at each retry attempt.

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Update your billing email

By default, invoices are sent to the email address you registered with. To use a different address for billing documents:
1

Open Billing Settings

Go to Account Settings → Billing and click Billing Details.
2

Enter a new billing email

Type the new email address in the Billing Email field and click Save. Future invoices will be sent to this address. Your login email is unchanged.

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Add tax information (VAT ID)

If your business is VAT-registered, you can add your VAT ID so it appears on all invoices.
1

Open Billing Details

Go to Account Settings → Billing → Billing Details.
2

Enter your VAT ID

Click Add Tax ID, select your country from the dropdown, and enter your VAT registration number. Click Save.
3

Verify the update

Your VAT ID will appear on all invoices generated from this point forward. To update an existing VAT ID, click the pencil icon next to the current entry and enter the new number.
VAT ID validation is handled automatically. If your number fails validation, check that you’ve selected the correct country and entered the full registration number, including any country prefix (e.g. GB for United Kingdom VAT numbers).

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Supported payment methods

Sinosend payments are processed by Stripe, a PCI-DSS Level 1 certified payment provider.
For high-volume enterprise billing or invoiced payment terms, contact the Sinosend sales team at sales@sinosend.com.

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Frequently asked questions

Can I get a refund? Sinosend does not offer refunds for partial billing periods. If you believe you were charged in error, contact Sinosend support with your invoice number and a description of the issue. Why does my invoice show a prorated amount? Prorated charges appear when you upgrade mid-cycle. Sinosend credits the unused days of your old plan and charges only the difference for the remainder of the billing period. See Upgrade & Downgrade for a full explanation. How long does Sinosend keep invoice records? Invoice history is retained indefinitely. You can download receipts for any past charge at any time from the Invoice History table.