Here's a draft you can adapt — fill in the bracketed parts:

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**Subject:** Security deposit return — [your address], moved out [date]

Hi [Landlord's name],

I'm writing about my security deposit for [rental address]. I moved out on [date] and returned the keys on [date], and I've given you my forwarding address at [address].

It's been seven weeks and I haven't received my $1,400 deposit, nor any written statement of deductions. I've also sent several text messages that I haven't received a response to, so I'm following up by email so we have a written record.

Please do one of the following by **[date — e.g., 14 days from now]**:

1. Return the full $1,400, or
2. Send an itemized written statement of any deductions, with receipts, along with the remaining balance.

I'd like to resolve this without taking any further steps, but if I don't hear from you by that date I'll look into my options, which may include filing a claim in small claims court or with the appropriate local housing agency.

You can reach me at [phone] or [email]. I'm happy to answer any questions about the condition of the unit.

Thank you,
Sam [Full name]
[Former unit/address]
[Forwarding address]

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**A few tips:**
- Send it to whatever email address is on your lease, and CC any other address or property manager you have.
- Deposit deadlines vary a lot by state/city (some are 14–30 days, some allow 60), and some places let you recover double or treble damages for a bad-faith withholding. Worth a quick search on your local rules — it also strengthens the email if you mention the specific deadline.
- Screenshot your unanswered texts and keep the email and any delivery confirmation.
- If you have any photos/video from move-out, keep them handy in case he claims damage.

Want me to make it shorter, more formal, or add a line about a specific state law?