Guest Invoice Login by Provonic is a WHMCS guest invoice module that lets clients pay invoices without login. Every invoice email can carry a secure invoice link: a guest invoice link, a guest payment link and an invoice payment link in one, so clients pay invoice without login, pay without logging in and pay invoices without logging in, on any device. No account, no password and no login barrier between your client and the payment: an invoice without login flow on the native WHMCS billing system, and the simplest way to offer WHMCS pay without login, invoice pay without login and pay invoice without logging in.

Each invoice link is an encrypted invoice URL with its own expiry time. The link carries the invoice, the client and the expiry, all encrypted by WHMCS, so a payment link cannot be read, edited or reused for another invoice. Following it opens a one-invoice guest session through WHMCS single sign-on: an auto login invoice link, auto-login payment link and passwordless invoice access that lands straight on the invoice, ready for guest checkout through your normal payment gateways. Expiring invoice links and guest invoice links stop working on their own, so a forwarded email or an old payment link cannot be used forever.

Put the link into any invoice email template with a merge field: an email payment link, an invoice email link or a pay now link in your invoice emails, overdue notices and payment reminders. Or copy invoice link from the invoice page and send a shareable invoice link by chat, SMS or ticket. Clients who forgot their password, never made an account, or have someone else paying on their behalf can pay the invoice in seconds, which means faster invoice payments and fewer overdue invoices.

Guest Invoice Login is guest invoice for WHMCS, a WHMCS guest invoice, WHMCS invoice link, WHMCS payment link, WHMCS guest payment, WHMCS guest checkout and WHMCS pay invoice without login module: a payment link for WHMCS, invoice link for WHMCS and guest payment for WHMCS that works with your existing gateways.

Admin Features:

• Merge Field For Email Templates:
  • {$sso_url} Ready-Made Hyperlink
  • {$plain_sso_url} Plain URL For Text Emails
• Works In Invoice, Order And Service Emails
• Link Expiry Time From 1 To 720 Hours
• Expiry Encrypted Inside Every Link
• Client Area Customization:
  • Colour Mapping For Your Template
  • Light And Dark Mode
  • Ready-Made Mappings For Five Themes
• Check For Update And Daily Auto Update
• Licence And Version On The Info Tab

Client Features:

• Pay Invoices Without Logging In
• Secure Invoice Link From Email
• Copy Invoice Link Button On The Invoice Page
• Guest Payment Through Your Gateways
• Clear Message For Expired Or Invalid Links

Security:

• One Link, One Invoice
• Invoice Ownership Checked On Every Link
• Encrypted Client, Invoice And Expiry
• Guest Session Locked To The Invoice
• No Access To Services, Domains Or Tickets
• Session Ends On Logout
• Link Never Written To Any Log

General Info:

• WHMCS 8.x And 9.x
• PHP 8.1, 8.2, 8.3 And 8.4
• ionCube Loader v13, v14 Or v15
• Six, Twenty-One, Nexus, Nexum And Lagom Themes
• 28 Language Files Included

Available Pricing Models:

• Monthly: $5
• Annually: $24
• One-Time: $29
• Open Source: $99