Can I include payment stubs or remittance slips?

Yes. Upload your invoice PDF exactly as you want it printed. If your invoice includes a detachable payment stub at the bottom, it will print that way. We print your document exactly as uploaded on standard 8.5x11 paper.

Do you support bulk invoice mailing?

Yes. You can upload and send invoices one at a time or in batches. Each invoice is a separate mail piece with its own tracking number. For high-volume needs (100+ invoices/month), contact us about volume pricing.

How do I prove delivery for collections or disputes?

Every letter includes USPS tracking. You can see when your invoice was printed, when it entered the mail stream, and when it was delivered. This tracking information is stored in your account and can be exported for audits or legal proceedings.

What's the cost for a typical 2-page invoice?

A 2-page black & white invoice costs $1.70 ($1.50 for the first page + $0.20 for the second page), plus a small platform fee. Color invoices are $2.15. View our full pricing page for details.

Is there a discount for monthly volume?

For businesses sending 100+ invoices per month, we offer volume pricing. Contact us to discuss your needs and get a custom quote.

How long does delivery take?

We process orders the same day, print the next business day, and mail the day after. Most letters arrive within 1–5 business days (not guaranteed).

Can I track which invoices have been delivered?

Yes. Your dashboard shows the status of every invoice: Draft, Paid, Processing, In Transit, and Delivered. You'll also receive email notifications when invoices are delivered.

Is my financial data secure?

Absolutely. Your documents are encrypted in transit and at rest. Files are processed automatically by our printing system - no human ever sees the content. Documents are permanently deleted within 7 days of printing.

Recommended product tracks for finance workflows

Start with letters and envelope handling, then use compliance resources for proof-sensitive mail.

Letters

Live

Send business letters with tracked USPS delivery and full address verification before checkout.

Send a Letter

Envelopes

Live

Support multi-page documents with standard and flat-envelope handling for larger print jobs.

Configure Envelope Mail

Certified Mail

Coming soon

Use certified-mail workflows for notices that require stronger proof of mailing and delivery.

Learn About Certified Mail

Browse Blog Articles

Mail invoices without the mailroom

Upload invoice PDFs and we print and mail them via USPS with tracking. Prove delivery for audits.

Send Your First Invoice See Pricing

Delivery Tracking on Every Invoice

USPS tracking on every invoice
Address verification before checkout
No subscription or monthly minimums
Transparent per-letter pricing

Secure Payments

USPS Delivery

Mail API

Hosted on Vercel

Neon Database

SSL Encrypted

Proof for Finance Operations

Built for teams that need predictable invoice delivery, visible status, and lower internal fulfillment overhead.

Accounts Receivable Flow

Invoice mail goes out without internal print bottlenecks

Finance teams can upload final invoice batches and move fulfillment off shared office resources.

No manual print, fold, and stamp workflow
Consistent submission-to-mail process
Predictable operations during month-end cycles

Turnaround

Billing notices stay on schedule

Same-day processing and next-business-day print cycles reduce fulfillment lag for time-sensitive collections and reminders.

Same-day processing after checkout
Next-business-day print cycle
USPS handoff timeline stays visible

Delivery Confidence

Each mailing includes verification and tracking

Address checks happen before payment and tracking remains visible through delivery events.

USPS-verified address before checkout
Tracking and delivery confirmation history
Fewer avoidable return-to-sender cycles

Support Efficiency

Teams answer payment-status questions faster

Shared delivery visibility helps AR and support teams resolve invoice-delivery questions without ad-hoc follow-up.

Single status history per mailed invoice
Less manual coordination across teams
Faster follow-up on overdue accounts

ROI Snapshot for Invoice Mail

Use this baseline with your monthly invoice volume, then compare against your current in-office print and handling workflow.

Postmarkr cost / letter

$1.50 - $1.75

If you mail 100 / month

$150 - $175

If you mail 250 / month

$375 - $438

Add local labor time, print supplies, and internal mailing steps to estimate your full process delta.

View Full Pricing

Why Finance Teams Choose Postmarkr

Reliable, trackable mail delivery for your accounts receivable process.

Catch bad addresses before you pay

We verify every address against the USPS database. That means fewer returned letters and less wasted postage.

USPS address verification on every letter
Instant feedback on deliverability issues
No more wasted postage on bad addresses

Postmarkr address validation step catching errors before mailing

Prove Delivery for Audits

Every invoice gets a tracking number. Know exactly when it was printed, when it entered the mail stream, and when it was delivered. Perfect documentation for audits and disputes.

Real-time USPS tracking on every letter
Delivery confirmation for your records
Complete audit trail from upload to mailbox

USPS certified mail receipt proving delivery for audit documentation

Skip the printing and stuffing

Stop printing, folding, stuffing envelopes, and running to the post office. Upload a PDF and we handle everything. What took hours now takes minutes.

Upload a PDF, we do the rest
No printing, folding, or stuffing
Processed same day, printed next, mailed the day after

Lease renewal notice ready for USPS delivery

Track Every Invoice

Get notified when your invoices are printed, mailed, and delivered. See the status of every piece of mail in one dashboard. No more wondering if it got there.

Email notifications at each stage
Dashboard with all mail status
Know exactly when invoices arrive

Postmarkr mail tracking journey showing delivery timeline for audit proof

Send Invoices in 4 Simple Steps

From upload to checkout in minutes.

30 sec

Upload

Upload your PDF (up to 50 pages)

20 sec

Address

Enter the address and we verify it with USPS

10 sec

Review & Pay

See the exact cost before you pay. No surprises.

1-5 days (USPS)

Track

We print and mail it. You track delivery

Send Your First Invoice

Perfect For

Common finance use cases that benefit from physical mail delivery.

Past-Due Reminders

Send payment reminders that get noticed. Physical mail has higher open rates than email.

Monthly Statements

Automated statement delivery for customers who prefer or require paper copies.

Demand Letters

Formal collection notices with delivery tracking for compliance documentation.

Net-30/60/90 Collections

Escalating collection letters with proof of delivery for each stage.

Year-End Summaries

Annual account statements and tax documents mailed on schedule.

Government Invoices

Meet physical mail requirements for government contracts and municipal billing.

1099 & W-9 Mailings

Tax document delivery with tracking and delivery confirmation.

Construction Lien Notices

Legal notices with proof of mailing for mechanic's lien requirements.

Frequently Asked Questions

Common questions from finance teams about invoice mailing

View All FAQs

Ready to Modernize Your Invoice Process?

Create an account free, then pay only when you send mail.

Send Your First Invoice View Full Pricing

No subscription requiredNo minimumsCreate account freeCancel anytimeDelivery guarantee — Lost in the mail? We resend for free

Related resources for finance teams

Guides that support invoice mailing, receivables operations, and proof-sensitive workflows.

Jan 6, 2026

Why Businesses Still Mail Invoices: Compliance and Payment

Discover why businesses still mail paper invoices. Learn about compliance requirements, proof of delivery benefits, and when mailed invoices outperform email.

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