PO Box 589 Claysburg PA Letter: Who Sent It and Is It Real?
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“Return Mail Processing, PO Box 589, Claysburg, PA 16625-0589” is not a company. It is a shared return address printed on data breach notification letters that many unrelated organizations send — almost always with an offer of free Experian IdentityWorks credit monitoring. A claysburg pa letter is usually genuine, but it is a breach notice, not a check and not a settlement. The company that lost your data is named in the letter itself; that is the name to verify.
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Reviewed by Leonard Goldberg, Editor · Last updated
What the Claysburg Address Actually Is
Every sample letter we read with this return address follows the same template: the sender's name or logo at the top, then Return Mail Processing, PO Box 589, Claysburg, PA 16625-0589, a mailing code above your address (for example “Q4384-L06”), the heading “Notice of Data Breach,” and an enrollment block for Experian IdentityWorks with a personal activation code and an “engagement number.” The senders have nothing in common: Kroger (letters dated February 19, 2021), Maximus Human Services after the 2023 MOVEit attack, Welcome Health (September 6, 2024), Catalyst Brands (September 4, 2026) and Upbound Group (September 23, 2026). The common factor is the mailing vendor, not the breach. The California Attorney General's copies of several of these letters are filed under names beginning “EXPERIAN_” or “EXP_”, which fits Experian's breach-response service producing the mailing. Indiana station WTHR has reported that a breach letter from the Indiana Department of Health with this out-of-state address was real. A sister address, PO Box 470, Claysburg, PA 16625-0470, appears on the same kind of letter. In short, return mail processing claysburg pa is where undeliverable envelopes go back to — it tells you who printed the letter, not who lost your data.
Case Details
The address itself is not tied to any lawsuit. Whether a case exists depends entirely on which organization's breach your letter is about. Two examples we have covered: the WilmerHale breach, whose letters were dated July 15, 2026 and mailed through Return Mail Processing in Claysburg, and the Urban One breach, whose April 18, 2025 letter came from Claysburg and which led to Konneh v. Urban One, Inc., No. 8:25-cv-01460-PX (D. Md.) — a $675,000 settlement that won final approval on September 25, 2026. For the newest senders, Upbound Group and Catalyst Brands, we found law-firm announcements of investigations into Upbound but, as of October 5, 2026, no filed case we could verify.
Status: A Notification Address, Not a Settlement
How to Tell If Your Letter Is Genuine
Start with the company name, not the address. The Claysburg box is shared, so it proves nothing on its own — but it is also no reason to throw the letter away. Look for the organization named at the top and in the “What Happened” section, then check it independently: search that company's name with “data breach,” look for the notice on a state attorney general's breach list (California, Massachusetts and others publish sample letters), or call the company using a number from its own website.
No signature is normal. The Catalyst Brands sample ends with “Sincerely,” and no name; the Upbound sample uses an electronic “/s/” signature. A missing handwritten signature is not a warning sign on a mass mailing.
Check the web address. Genuine letters send you to experianidworks.com (Upbound and Catalyst use experianidworks.com/1Bcredit) with an activation code. None of the sample letters we read contain a QR code. If yours has one, do not scan it — type the address printed in the letter instead. Experian enrollment asks for your activation code; a real letter never asks you to pay, and never asks you to mail back your Social Security number.
Does This Letter Mean Money?
Letters Sent From PO Box 589, Claysburg
- 1
February 19, 2021 — Kroger
Kroger begins mailing notices about the Accellion file-transfer breach from Return Mail Processing, PO Box 589, with two years of Experian monitoring.
- 2
2023 — MOVEit wave
Maximus Human Services mails notices about the MOVEit Transfer attack from the same box. Paul Martin's American Grill's letter of July 3, 2023 uses it too.
- 3
September 6, 2024 — Welcome Health
Welcome Health's breach notice from PO Box 589 offers two years of Experian credit monitoring and identity protection.
- 4
July 15, 2026 — WilmerHale
WilmerHale's notification letters are dated and mailed through Return Mail Processing in Claysburg. Their Experian code stops working on October 31, 2026.
- 5
September 4, 2026 — Catalyst Brands
Catalyst Brands notifies people affected by an HR and payroll vendor incident. Experian IdentityWorks for 24 months; enroll by December 31, 2026.
- 6
September 23, 2026 — Upbound Group
Upbound mails notices about files taken July 3–6, 2026. One year of Experian monitoring; activate by December 31, 2026.
Three Things to Watch For
The letter is usually real. What follows it is where people get caught:
Calls or texts “following up” on your breach letter
Once a breach is public, anyone can mention it. The Catalyst letter itself warns about unsolicited messages that ask for personal information. If you want to talk to someone, call the number printed in the letter (for Upbound, 833-918-1248) — never one given to you by a caller.
“Claim your Upbound settlement” sites
As of October 5, 2026 there is no Upbound or Catalyst Brands settlement, so there is no claim form. A page asking for your Social Security number or a fee to “register” for a payout is not connected to any court.
Lookalike enrollment links and QR codes
The real enrollment site is experianidworks.com, and your activation code is unique — the Upbound letter says it “should not be shared.” Do not give the code to anyone, and do not reach the site through a QR code, email link or search ad.
Claysburg PA Letter — Questions People Actually Ask
Who sends letters from PO Box 589, Claysburg, PA 16625-0589?
Many unrelated organizations that had a data breach. The box is a shared return-mail address; every sample we read offered Experian IdentityWorks monitoring. Recent senders include Upbound Group (September 23, 2026) and Catalyst Brands (September 4, 2026). The name at the top of your letter is the actual sender.
Is a letter from Return Mail Processing in Claysburg a scam?
Usually not. The address is used on genuine breach notices filed with state attorneys general. Verify the company named in the letter independently, and use only the experianidworks.com address and phone numbers printed in it.
Why is there no signature on my letter?
These are mass mailings. The Catalyst Brands sample ends with “Sincerely,” and no name, and the Upbound sample uses an electronic “/s/” signature. Neither is a sign of fraud.
My letter has a QR code. Should I scan it?
None of the sample letters we read contain a QR code; they give a web address and an activation code. A QR code alone does not prove a scam, but the safer choice is to type the printed experianidworks.com address yourself.
Why would a company I never dealt with have my information?
Breaches often happen at vendors or employers. Catalyst Brands' incident involved a third party supporting its HR and payroll services, and Maximus's involved the MOVEit file-transfer tool. The letter's “What Happened” section explains the link to you.
Is this letter a settlement or a check?
No. It is a breach notice offering free monitoring. A settlement notice comes later, only if a lawsuit settles, and names the court case and an official settlement website.
Is there a deadline?
Yes, for the free monitoring. Upbound's and Catalyst's codes must be used by December 31, 2026; WilmerHale's by October 31, 2026. After the date in your letter, the code stops working.
What should I do with the letter?
Enroll in the monitoring before the deadline, consider a free credit freeze at all three bureaus, and keep the letter and envelope — they prove you were notified if a settlement ever follows.
Separate from this case: were you injured in the last 2 years?
Class-action payouts are fixed amounts through an administrator. A personal injury claim is a different case — and often worth far more. Free estimate, no obligation.
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