Automated Invoice Approval Workflow with File Request Pages, Google Sheets, and Email Notifications

Invoice approvals often start simple: someone emails an invoice, someone else forwards it for approval, and a finance team updates a spreadsheet when they remember. That process works until invoices get missed, approvals are unclear, payment status is hard to track, and the team spends too much time asking for updates.

This workflow uses FileDrop File Request Pages, Google Sheets, and email notifications to create a structured invoice submission and approval process without adding another finance platform or extra software cost.

Invoice requests are submitted through a form, responses automatically drop into a tracking sheet, approval notifications are sent by email, and a simple dashboard gives the team visibility into pending, paid, and flagged invoices.

Who This Is For

This workflow is useful for:

• Small businesses that receive vendor invoices by email
• Agencies that need project managers to approve supplier or contractor invoices
• Finance and operations teams that want a lightweight approval tracker
• Nonprofits and schools that need controlled invoice intake
• Teams already using Google Workspace and spreadsheets for operations

The Problem

Manual invoice approval creates avoidable friction:

• Invoices arrive in different inboxes and formats
• Required information is missing from submissions
• Approvers are unclear or not notified consistently
• Payment status is tracked manually
• Finance has no quick view of what is pending, paid, overdue, or flagged
• Email threads become the system of record

The goal is to replace scattered invoice emails with one repeatable process.

The Workflow

1. A vendor, contractor, employee, or internal team member submits an invoice through a FileDrop File Request Page.
2. The form collects required invoice details and the invoice file.
3. Uploaded invoice files are saved to the connected Google Drive folder.
4. Each submission is automatically added to a Google Sheet with links to the uploaded files.
5. Email notifications alert the finance team or assigned approver.
6. The sheet tracks approval status, payment status, due dates, and exceptions.
7. A dashboard summarizes pending approvals, paid invoices, flagged invoices, and upcoming due dates.

File Request Page Setup

Create a File Request Page called something like:

Submit an Invoice for Approval

Suggested form fields:

• Vendor name
• Vendor email
• Invoice number
• Invoice date
• Due date
• Amount
• Currency
• Department or project
• Requested approver
• Purchase order number
• Invoice category
• Notes or special instructions
• Invoice upload field
• Supporting documents upload field

Recommended required fields:

• Vendor name
• Vendor email
• Invoice number
• Due date
• Amount
• Department or project
• Invoice file

This ensures every invoice enters the process with the minimum information finance needs.

Google Drive File Storage

Uploaded invoice files can be saved automatically to a connected Google Drive folder. This keeps the files organized outside of email while the Google Sheet stores the structured submission data and direct file links.

Recommended Drive folder structure:

• Invoices
• Invoices / Pending Approval
• Invoices / Approved
• Invoices / Paid
• Invoices / Flagged

Alternative folder structures:

• By vendor
• By month
• By department
• By project or client

The tracking sheet should include direct links to the uploaded invoice files and supporting documents, so finance and approvers can open the files without searching Drive manually.

Google Sheets Tracking

Connect the File Request Page responses to Google Sheets or export the submissions into a sheet used as the invoice tracker. The sheet becomes the operational view, while Google Drive stores the actual invoice files.

Suggested columns:

• Submission timestamp
• Vendor name
• Vendor email
• Invoice number
• Invoice date
• Due date
• Amount
• Currency
• Department or project
• Approver
• Invoice file link
• Supporting file links
• Approval status
• Payment status
• Payment date
• Flag reason
• Internal notes

Suggested approval statuses:

• New
• Pending approval
• Approved
• Rejected
• Needs clarification
• Flagged

Suggested payment statuses:

• Not scheduled
• Scheduled
• Paid
• Overdue
• On hold

Email Notifications

Use email notifications to keep the process moving.

Recommended notification rules:

• Notify finance when a new invoice is submitted
• Notify the requested approver with the invoice details and file link
• Notify the submitter that the invoice was received
• Notify finance when an invoice is flagged or needs clarification

Example finance notification:

Subject: New invoice submitted for approval

Body:

• Vendor
• Invoice number
• Amount
• Due date
• Department or project
• Requested approver
• Link to uploaded invoice
• Link to tracking sheet

Example approver notification:

Subject: Invoice approval needed

Body:

• Vendor
• Amount
• Due date
• Project or department
• Invoice file link
• Instructions to mark the invoice Approved, Rejected, or Needs clarification in the tracker

Dashboard View

The dashboard can be built directly in Google Sheets using filters, pivot tables, charts, or separate tabs.

Useful dashboard sections:

• New invoices awaiting review
• Pending approval by approver
• Approved but unpaid invoices
• Paid invoices this month
• Overdue invoices
• Flagged invoices
• Total invoice amount by status
• Total invoice amount by department or project

Suggested dashboard tabs:

• All invoices
• Pending approvals
• Payment queue
• Paid invoices
• Flagged invoices
• Monthly summary

Example Sheet Formulas

Days until due:

=DUE_DATE_CELL - TODAY()

Overdue flag:

=IF(AND(PAYMENT_STATUS_CELL<>"Paid", DUE_DATE_CELL<TODAY()), "Overdue", "")

Approval queue filter:

=FILTER(A:Q, N:N="Pending approval")

Paid this month:

=FILTER(A:Q, O:O="Paid", MONTH(P:P)=MONTH(TODAY()), YEAR(P:P)=YEAR(TODAY()))

Adjust the column letters to match the actual tracker.

Make a copy of the Google Sheets.

Recommended Process

1. Finance shares the invoice submission page with vendors and internal teams.
2. Every invoice must be submitted through the page, not by email.
3. New submissions enter the sheet with a default status of New or Pending approval.
4. The approver reviews the invoice file and updates the approval status.
5. Finance reviews approved invoices and updates the payment status.
6. Flagged invoices stay visible until the issue is resolved.
7. The dashboard is reviewed weekly or before payment runs.

Benefits

This workflow helps teams:

• Standardize invoice submissions
• Reduce missing invoice details
• Keep invoice files connected to tracking records
• Give approvers a clear queue
• Give finance visibility into payment status
• Avoid buying a separate approval platform for a lightweight workflow
• Keep the process inside tools the team already uses

FAQ

Why use FileDrop instead of Google Forms for invoice collection?

Google Forms is useful for simple data collection, but invoice workflows usually need stronger file handling, a more professional submission experience, and better control over how files are collected. FileDrop File Request Pages are designed around collecting files and structured information together.

With FileDrop, teams can create a branded invoice submission page, collect invoice files and supporting documents, route submissions into Google Sheets, and keep uploaded files organized in Google Drive. The result is closer to an operational intake workflow than a basic form.

What are the main advantages over a basic Google Form?

Key advantages include:

• A more professional, branded invoice submission page
• File request workflows designed specifically for collecting documents
• Clear file upload fields for invoices and supporting documents
• Direct links from the tracking sheet to uploaded files
• Better organization of uploaded files in Google Drive
• Email notifications for finance teams, approvers, and submitters
• A cleaner process for vendors, contractors, and internal teams
• Less manual searching through email attachments

Can Google Forms still be part of the workflow?

Yes. Teams that already use Google Forms can still use Google Sheets as the tracking layer. But when file collection is central to the workflow, FileDrop is usually a better front end because the page is built around file requests, document intake, and structured submissions.

Does this replace accounts payable software?

Not for complex finance teams with multi-step approval chains, purchase order matching, ERP integrations, or strict accounting controls. This workflow is best for small teams that need a practical invoice intake and approval tracker without paying for a full accounts payable platform.

What other benefits does this workflow provide?

It gives the team one place to submit invoices, one place to store invoice files, and one place to track status. Finance can see what is pending, what is approved, what has been paid, and what needs attention. Approvers get clearer notifications, and vendors do not need to send files through scattered email threads.

Can this help reduce missed or late payments?

Yes. Because every invoice enters the same tracking sheet with due dates and payment status, the team can build views for overdue invoices, upcoming due dates, and approved-but-unpaid invoices. That makes it easier to catch issues before payment deadlines are missed.

Can we use this for internal reimbursement requests too?

Yes. The same structure can be adapted for employee reimbursements, contractor payments, purchase requests, expense documentation, or vendor onboarding documents.

Example Use Case

An agency receives invoices from freelancers, media vendors, and software suppliers. Instead of asking everyone to email invoices to the finance inbox, the agency creates one FileDrop invoice submission page.

Each invoice submission captures the vendor, amount, due date, client project, and uploaded invoice. The invoice file is saved to the connected Google Drive folder, and the response appears in Google Sheets with a direct link to the file. The project manager gets an email notification when approval is needed. Finance uses the sheet dashboard to see which invoices are new, approved, paid, overdue, or flagged.

The result is a simple approval workflow with a clear audit trail and no additional invoice approval software.

Implementation Checklist

• Create the FileDrop File Request Page
• Add required invoice fields
• Add invoice and supporting document upload fields
• Connect the page to the correct Google Drive folder
• Connect or export responses to Google Sheets
• Create approval and payment status columns
• Add dashboard tabs or filtered views
• Configure email notifications
• Test one invoice submission from start to finish
• Share the submission link with vendors and internal teams
• Review the dashboard during each payment cycle

Suggested Page Copy

Page title:

Submit an Invoice for Approval

Intro text:

Use this form to submit invoices for review and payment processing. Include the invoice file, due date, amount, and approver details so our finance team can process it without delays.

Confirmation message:

Your invoice has been received. Our team will review it and contact you if more information is needed.

Positioning Summary

This workflow is not meant to replace a full accounts payable platform for complex finance teams. It is designed for teams that want a structured invoice approval process using FileDrop, Google Sheets, and email notifications.

For many small teams, that is enough: one form for submissions, one sheet for tracking, automatic notifications, and a dashboard that shows what needs attention.