Tapped someone at a red light — now they're claiming pre-existing damage is my fault?

This happened to me almost exactly. Minor tap in a parking lot, other driver was totally chill at the scene, then suddenly a week later I'm getting calls about "structural damage." The rust thing is a real tell — fresh collision damage doesn't rust overnight. Definitely get your own photos of everything you still can and document the timeline of when he said it was fine vs. when the claim appeared.

A couple of practical things worth knowing: your dashcam footage is actually more valuable than you might think even if it doesn't show his bumper clearly, because it can establish your speed and the force of impact. A forensic argument that the contact couldn't have caused that level of structural damage at that speed is a real thing. Also, document in writing (even just an email to yourself with a timestamp) exactly what the other driver said at the scene. Memory fades and having a contemporaneous record matters.

Do NOT just roll over and accept liability here. Adjusters sometimes pressure people into accepting claims because it's easier for everyone — except you. Pre-existing damage is a legit defense and they know it. If you have that dashcam footage, hold onto it tightly and don't hand it over without understanding exactly how it'll be used.

I don't doubt you, but I do want to ask — did you take any photos at the scene when you both pulled over? And do you have anything in writing or text from the other driver saying there was no damage? Because "we shook hands" is going to be really hard to prove if this escalates. Lesson for everyone honestly: always take photos even when both parties seem cool about it.

Ugh, this is the worst. You did the right thing by stopping and being decent about it and now you're getting burned for it. I'm so sorry. Please just make sure you're not handling this alone — even a quick free consultation with a lawyer might help you understand your options before you say anything else to his insurance company.

Worked claims for years. Rust on structural components is a huge red flag that the damage predates the incident. When I was handling files, we were supposed to account for pre-existing condition, but honestly the pressure to close claims fast means that sometimes doesn't happen fairly. You have every right to request an independent inspection. Ask your insurer specifically whether they'll have someone assess the age and origin of the damage — a good body shop can usually tell.

Not legal advice, but the concept of "prior existing condition" is well established in auto liability disputes. The burden generally falls on the claimant to show the damage was caused by your specific incident. Rust and visible aging of metal components can support an argument that the damage predates the collision. The contact speed and your dashcam may also help establish that the force involved wasn't consistent with that type of structural damage. Worth at least a free consult before you agree to anything.

Turn it over to your insurance, full stop. That's what you pay them for. Give them the dashcam footage, tell them the other driver said it was fine at the scene, and mention the rust. Let them fight it. Don't try to negotiate this yourself — you'll just say something that gets used against you.