# Send Acquisition Offers and LOIs via API

> Mail purchase offers, letters of intent, and follow-up correspondence to property owners and sellers — triggered by deal signals, tracked with certified delivery proof.

## How it works

1. Agent or deal pipeline scores a property or identifies a motivated seller
2. System generates an offer letter or LOI PDF with property details, terms, and contingencies
3. POST the PDF to mailbox.bot with `mail_class=certified` for proof of receipt
4. Delivery events update the deal record. No response triggers follow-up on day 14.

## Code example

```bash
curl -X POST https://mailbox.bot/api/v1/mail \
  -H "Authorization: Bearer sk_agent_live_..." \
  -F 'document=@offer-letter.pdf' \
  -F 'recipient_name=Jane Property Owner' \
  -F 'recipient_line1=456 Oak Ave' \
  -F 'recipient_city=Phoenix' \
  -F 'recipient_state=AZ' \
  -F 'recipient_zip=85001' \
  -F 'mail_class=certified'
```

## Why certified mail for acquisition offers

- Proves the seller received the offer (important for earnest money disputes)
- Certified mail with return receipt is admissible evidence for contract enforceability
- Creates a timestamped record that your offer arrived before a competitor's

## Multi-touch sequences

- Day 1: Initial offer letter (certified)
- Day 14: Follow-up with revised terms (first class)
- Day 30: Final offer or withdrawal notice (certified)
- Each letter tracked individually in the deal record

## Cost

- First class offer letter (1 page): $1.08
- Certified offer letter (1 page): $6.38
- Certified + return receipt: $10.78

## Best for

- Real estate investors running acquisition campaigns from property data
- Wholesalers mailing offers to sellers across multiple markets
- AI agents managing deal pipelines with a physical outreach step
- Any acquisition workflow where speed-to-mailbox is a competitive advantage

## Related

- HTML page: https://mailbox.bot/use-cases/asset-acquisition-offers
- Real estate acquisitions workflow: https://mailbox.bot/workflows/real-estate-acquisitions
- Certified mail API: https://mailbox.bot/use-cases/certified-mail-api