Proof of mailing and delivery changes the dynamic
When you send your appeal by USPS Certified Mail, you get a dated mailing receipt and delivery tracking that shows when the company received it. That starts any response clock in your contract and answers the "we never got it" response before it comes up.
When to add return receipt
Plain certified mail already proves mailing and delivery. Add return receipt — the recipient's signature — only when your contract's notice or arbitration provision requires notice "by certified mail, return receipt requested." Search your contract for "notice" and read the arbitration section; if that phrase appears, send it that way, because plain certified mail may not satisfy the requirement. Otherwise the signature you get back is usually from whoever was in the mailroom, not the adjuster — the tracking record is the proof that matters.
Keep the record
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Upload your denial letter and we'll identify the reason, find the clause it relies on, and tell you where you stand. Free.
Save the mailing receipt and the delivery confirmation in your case file alongside your call log. If you later file a regulator complaint, this timeline is your best friend.
Verify the address first
Appeals departments move. Confirm the mailing address on the company's website or by phone before you send — Denial Decoder's letter tool builds this verification step in.