Free Sequences

Invoice Follow-Up Email Templates

Four multi-channel follow-up sequences that combine email and phone. Each sequence includes timing, scripts, and escalation triggers so you know exactly what to do and when.

The 4-Phase Follow-Up System

Most AR teams use email-only follow-ups and wonder why they do not get paid. The data is clear: multi-channel outreach (email + phone) has a 40% higher response rate than email alone. These sequences combine both channels at the right intervals.

PhaseTimingChannelsUrgency
Phase 1: Gentle NudgeDay 1-7 overdueEmail + optional callLow
Phase 2: Active Follow-UpDay 8-21 overdueEmail + phone callMedium
Phase 3: Firm EscalationDay 22-45 overduePhone + email + letterHigh
Phase 4: Final PushDay 46-60 overduePhone + certified letterCritical

Phase 1: Gentle Nudge (Day 1-7)

Goal: Surface the unpaid invoice. Assume good intent. Most invoices are simply lost or stuck in an approval queue.

Day 1
Email

Quick check-in on Invoice #INV-2024-0847

Subject: Quick check-in — Invoice #INV-2024-0847 ($4,750.00) Hi Sarah, I noticed Invoice #INV-2024-0847 for $4,750.00 was due yesterday. Just wanted to make sure it did not slip through the cracks. I have attached a fresh copy. If you have already sent payment, thank you — please disregard this. Is there anything you need from our side to process this? Best, James Mitchell Acme Corp | (555) 234-5678
Send at 9 AM in the recipient's timezone. Attach the invoice PDF.
Day 5
Email — Reply to Day 1 thread

Gentle bump

Subject: Re: Quick check-in — Invoice #INV-2024-0847 ($4,750.00) Hi Sarah, Just bumping this to the top of your inbox. Invoice #INV-2024-0847 for $4,750.00 is now 5 days past due. Can you let me know the status? Even a quick "it is in the queue" helps me on my end. Thanks, James
Reply to the original thread so the full context is visible. Keep it short — two sentences max.

Phase 2: Active Follow-Up (Day 8-21)

Goal: Get a commitment. The debtor has seen your emails. Now add a phone call to break through the noise.

Day 8
📞
Phone Call

First phone follow-up

Call script: "Hi Sarah, this is James Mitchell from Acme Corp. I am calling about Invoice INV-2024-0847 for $4,750 — it is about 8 days past due now. I sent a couple of emails but wanted to check in by phone in case those got buried. Is there any issue with the invoice, or is it just a timing thing? [LISTEN — take notes on their response] If they say it is in process: "Great, do you have an expected payment date I can note in our system?" If they mention cash flow issues: "I understand. Would it help to set up a short payment plan? We could split it into two payments if that makes things easier." If they raise a dispute: "I want to make sure we get this right. Can you email me the specifics of the concern? I will get our team on it right away." Thanks Sarah. I will follow up by email with a summary of what we discussed."
Call between 10-11 AM. If you get voicemail, leave a brief message and send the follow-up email.
Day 8
Email — After the call (or voicemail)

Call follow-up / voicemail recap

Subject: Following up on our call — Invoice #INV-2024-0847 Hi Sarah, Thanks for taking my call today. [Or: I just tried you by phone and left a voicemail.] Per our discussion, here is where we stand on Invoice #INV-2024-0847 ($4,750.00, now 8 days past due): - [Summarize what was discussed / Or: I would love to get a quick status update] - Expected payment date: [Date they committed to / Or: TBD — please advise] If anything changes or you need something from our end, just reply here. Best, James Mitchell Acme Corp | (555) 234-5678
Always send a written summary after a phone call. It creates a paper trail and locks in verbal commitments.
Day 15
Email — Status check

Checking in on committed date

Subject: Checking in — Invoice #INV-2024-0847 payment status Hi Sarah, Circling back on Invoice #INV-2024-0847 for $4,750.00 (now 15 days past due). [If they committed to a date]: You mentioned payment would be processed by [date]. I have not seen it come through yet — can you confirm the status? [If no prior response]: I have reached out a few times by email and phone and have not heard back. I want to resolve this between our teams, but I do need a response. Can you reply with a status update today? Looking forward to hearing from you. James Mitchell Director, Accounts Receivable Acme Corp | (555) 234-5678
Note the title escalation from "James Mitchell" to "Director, Accounts Receivable." This signals organizational seriousness.

Phase 3: Firm Escalation (Day 22-45)

Goal: Force a decision. The debtor knows they owe you. Now introduce consequences and deadlines.

Day 22
📞
Phone Call — Escalation

Direct conversation with consequences

Call script: "Hi Sarah, this is James Mitchell, Director of Accounts Receivable at Acme Corp. I need to speak with you about Invoice INV-2024-0847 for $4,750. This invoice is now 22 days past due. I have reached out four times — two emails and a phone call — and we have not been able to resolve this. I want to be upfront with you: our policy is that accounts over 30 days past due are subject to late fees and potential service suspension. I would much rather work this out directly. Can we agree on a specific payment date today? If the full amount is difficult right now, I am authorized to set up a two-payment arrangement. [If they commit]: Great. I will send you a written confirmation of that. We will hold off on any late fees as long as payment comes through on [date]. [If they are evasive]: I understand. I do need to let you know that if we do not have payment or a written plan by [date 7 days out], I will need to escalate this per our policy. I really do not want to do that."
Day 30
Email — Formal notice

Official 30-day notice with consequences

Subject: Action required — Invoice #INV-2024-0847 is 30 days past due Sarah, Invoice #INV-2024-0847 for $4,750.00 is now 30 days past due. We have made five attempts to resolve this (Feb 16, 20, 23, Mar 3, and Mar 8). Per our service agreement, the following will take effect if payment or a written payment plan is not received within 7 business days: 1. Late fee of 1.5% per month ($71.25) applied to the balance 2. Suspension of services under your account 3. Referral to our collections process I want to avoid these steps. Please reply with one of the following: A) Payment has been submitted (confirmation number) B) Payment will be submitted by [specific date] C) We need to discuss a payment plan D) We dispute the invoice (please provide details) Regards, James Mitchell Director, Accounts Receivable Acme Corp | (555) 234-5678
The A/B/C/D format makes it trivially easy to respond. This increases response rates by 35% compared to open-ended asks.

Phase 4: Final Push (Day 46-60)

Goal: Last attempt before external escalation. Make it crystal clear what happens next.

Day 46
📞
Phone Call — Final attempt

Last direct call

Call script: "Sarah, this is James Mitchell from Acme Corp. I am calling one final time about the outstanding $4,750 on Invoice INV-2024-0847. This account is now 46 days past due. I have reached out multiple times over the past six weeks. We are at the point where, without payment or a plan by [date 7 days out], I am required to refer this to our external collection partner and report the delinquency to commercial credit bureaus. I genuinely do not want to do that. This is a relationship we value. Is there anything preventing you from making this payment? I can authorize a payment plan — even three monthly installments of $1,650 would work. [If they agree to a plan]: Excellent. I will email you a payment plan agreement today. Once you sign it, we will put the account on hold and stop the escalation process. [If no response/evasion]: I understand. I am going to send you a final written notice today. You will have 7 calendar days to respond before the account is referred externally. I hope we can resolve this."
Day 50
Certified Letter + Email

Final demand before external referral

Subject: FINAL NOTICE — Invoice #INV-2024-0847 referral in 7 days Sarah, This is a final notice regarding Invoice #INV-2024-0847 ($4,750.00 + $142.50 late fees = $4,892.50 total). Timeline of our collection efforts: - Feb 16: Email reminder (Day 1 overdue) - Feb 20: Email follow-up (Day 5) - Feb 23: Phone call + email (Day 8) - Mar 3: Email status check (Day 15) - Mar 8: Phone call — escalation (Day 22) - Mar 17: Formal 30-day notice (Day 30) - Mar 31: Phone call — final attempt (Day 46) In 7 calendar days, if we have not received payment of $4,892.50 or a signed payment plan agreement, we will: 1. Refer the account to a third-party collection agency 2. Report to Dun & Bradstreet and Experian Business 3. Reserve all legal remedies To resolve now: pay.acmecorp.com or call (555) 234-5678. This letter is being sent via certified mail and email. James Mitchell Director, Accounts Receivable Acme Corp
Send via certified mail AND email simultaneously. The certified mail provides legal proof of delivery. Include the full timeline of attempts.

More Collection Resources

Frequently Asked Questions

How soon should I follow up on an unpaid invoice?
Send your first follow-up the day after the invoice is due. Invoices contacted within 7 days of becoming overdue have a 90% collection rate, compared to just 50% for invoices first contacted at 60 days. Speed is the single biggest factor.
Should I call or email to follow up?
Use both. Email first for a paper trail, then follow up with a phone call 2-3 days later if there is no response. Multi-channel outreach has a 40% higher response rate than email alone.
How many times should I follow up before escalating?
A typical B2B collection sequence includes 7-10 touchpoints over 90 days before referring to a collection agency. Most payments come after the 3rd or 4th follow-up. Only 2% of collections happen on the first contact.

You Just Read a 60-Day Sequence. An AI Agent Runs It in Minutes.

These sequences work — but executing them manually takes hours per account. Your AR team is copying templates, tracking follow-up dates in spreadsheets, and hoping they remember to call on Day 8. Multiply that by 100 accounts and something always falls through the cracks.

The alternative: an AI agent that researches each debtor before making contact, then runs the entire multi-channel sequence automatically — emails, calls, letters, escalation, dispute resolution. One dedicated agent per account, not one human juggling 250.

AgentCollect runs sequences like these — but smarter

Recovery Rate
~50% in 20 days
vs. 20-30% in 6 months with traditional agencies
Attorney Mode
70% email open rate
vs. 20% for collection agency emails
Scale
85,000 recoveries/day
1 dedicated agent per account. Never misses a follow-up.
Mandate
12 months
Does not give up after 90 days. 0 compliance incidents.

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