> Portal Navigation: > > - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version. > - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages). > - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`). > - Top-level index of all portals: https://dev.wix.com/docs/llms.txt > - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt # Method name: sendInvoice(id: IdAndVersion, emailInfo: EmailInfo) # Method package: wixBillingBackend # Method menu location: wixBillingBackend --> Invoices --> sendInvoice # Method Link: https://dev.wix.com/docs/velo/apis/wix-billing-backend/invoices/send-invoice.md # Method Description: Sends an invoice preview link to a customer via email. The `sendInvoice()` function returns a Promise that resolves when the invoice with the specified ID and version is sent to the customer listed on the invoice. Use the `emailOptions` parameter to specify the subject and body of the email sent to the customer. # Method Code Examples: *** Note: do not assume any prop names or enum values other than the ones in the example. ## Send an invoice to a customer ```javascript import { Permissions, webMethod } from 'wix-web-module'; import { invoices } from 'wix-billing-backend'; export const sendInvoiceToCustomer = webMethod(Permissions.Anyone, (id, version, subject, body) => { const idAndVersion = { "id": id, "version": version }; const emailInfo = { "subject": subject, "body": body }; return invoices.sendInvoice(idAndVersion, emailInfo); }); ``` ## Get the invoice version and send the invoice to a customer ```javascript import { Permissions, webMethod } from 'wix-web-module'; import { invoices } from 'wix-billing-backend'; export const sendInvoiceToCustomer = webMethod(Permissions.Anyone, (id, subject, body) => { const emailInfo = { "subject": subject, "body": body }; return invoices.getInvoice(id) .then( (result) => { return invoices.sendInvoice(result.id, emailInfo); } ); }); ``` ---