Got an Unsolicited Offer?

A letter offering cash for mineral rights you never asked to sell raises one question: how do you know if the number is fair?

Mailbox offers on mineral rights are common, especially in counties with any recent leasing or drilling activity. Someone gets your name and address from the county clerk's real property or oil and gas records and sends a letter, sometimes with a specific dollar figure, sometimes just an invitation to call.

The offer itself isn't inherently a scam or a lowball, but it also isn't independently verified by anyone. The only way to know if it's fair is to benchmark it against what your interest would actually fetch on the open market, which takes a bit of homework before you sign anything.

Why buyers send unsolicited offers in the first place

Buying mineral rights below what they'll ultimately be worth, and reselling or holding for royalty income, is a legitimate business, and mailbox campaigns are simply how many buyers find willing sellers efficiently across a large area at once. A buyer sending you a letter has no obligation to offer their highest possible number; their first offer is a starting point they expect some owners to accept without comparing it to anything else.

That's not necessarily bad faith, it's just how a first offer works in any negotiation. Treating it as the only number available, rather than a starting point, is the mistake worth avoiding.

How to actually check whether an offer is fair

Get at least one more written estimate from a different buyer before deciding, referencing the same net mineral acreage, county, and production status. If a second estimate lands meaningfully higher, that tells you something about where the first offer sat. If it lands close, that's useful confirmation the first number was reasonable.

Check what you can verify independently too: recent oil and gas lease bonus amounts recorded in your county (often searchable through the county clerk or a title company), and whether any wells have been permitted or drilled near your specific tract recently. An offer that seems disconnected from visible activity in your area is worth extra scrutiny.

If your interest is producing, compare the offer against your actual royalty statements. A buyer who never asked to see your production history, and still gave you a specific number, may be working off county-level averages rather than your actual acreage.

Comparable sales, if you can find them, round out the picture. Some counties record mineral deed transactions in the same public records as real estate, and while the sale price isn't always listed clearly, a title company or landman can sometimes help interpret transfer tax stamps or other clues about what nearby fractional interests have recently sold for.

Red flags worth taking seriously

Pressure to sign quickly, before you have time to get a second opinion, is the most common warning sign. A legitimate offer should hold for at least a couple weeks; if a buyer insists the price expires within days with no clear reason, that's worth questioning.

Vague answers about how the offer was calculated are another flag. A buyer confident in their number can usually explain, at least in general terms, what production status, acreage, and county activity they're referencing. Also confirm exactly what interest they're offering to buy; some letters use ambiguous language about 'mineral rights' when they actually mean only a royalty interest, or a portion of what you own.

Finally, check who's actually sending the letter. A company with a real business address and a track record of closed transactions in your area is generally easier to verify than a P.O. box with no other information, and a quick search on the company name alongside the county name often turns up useful context either way.