MergeNinja

Late-rent notices for every tenant who owes, at once

QuickBooks Online Excel
app.mergeninja.com

Synced rent invoices

TenantRentDays
4B · T. Alvarez $1,450.00 10
12 · M. Chen $1,200.00 10
7A · R. Osei $980.00 41

Dear T. Alvarez,

Rent of $1,450.00 for unit 4B is now 10 days past due…

× every late tenant, at once

MergeNinja merges synced rent invoices into a Word letter for every customer at once.

Sound familiar?

Rent was due on the first. It's the tenth, and you're cross-referencing bank deposits against a spreadsheet to figure out who still owes, then writing the same awkward letter four times with different names and amounts.

A landlord invoicing rent through QuickBooks, on MergeNinja:

  1. 1

    Connect QuickBooks Online

    Read-only. Tenants and rent invoices sync with balances and due dates.

  2. 2

    Filter to open + past due

    Days overdue is computed per invoice: the late list builds itself on the tenth of the month.

  3. 3

    Merge the notice batch

    Every late tenant gets a dated, firm-but-friendly notice with their amount and days late, a consistent paper trail, generated in minutes.

The 10th

the late list builds itself, open + past due, days computed

1 batch

every late tenant, the same firm-but-friendly notice

Dated

a consistent paper trail, notice after notice

The documents you'd run with it

Frequently asked questions

Do the notices meet legal requirements for my state?

The wording is yours. MergeNinja fills your template, it doesn’t write legal text. Use the notice format your state requires (or your attorney provides) and merge the tenant, amount, and dates into it.

I track rent in a spreadsheet, not QuickBooks.

Upload the Excel or CSV file: map columns like tenant, unit, amount due, and days late once, and merge the same way.

Can I send year-end payment summaries to tenants?

Yes. Merge each tenant’s payment history into a statement template. Handy for tenants who need proof of rent paid.

Stop exporting. Start merging.

Connect your data, upload your Word template, and send every customer document in one click.

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