How do you deal with someone trying to call you "Stolen Valor"?

Tell them to eat a dick

That is a whole lot of what if's you're getting in to. Don't worry about tomorrow, for tomorrow will have it's own worries.

Kyle, aren't you going a little overboard? Your word should be good enough. Have you ever gotten a ticket for parking in a "Superhero Parking" spot. "How can I politely tell them they're wrong and to drop the situation?" WALK AWAY!! Me, personally, I think those parking spot should be turned into "Handicap Spot".

Do not worry about it. As an Army Vet I can easily tell by MOS, duty stations, place for basic or AIT, and any valid questions. Your identification etc are enough. Also join a Veterans organization. The organizations also do so much good for Vets.

I can prove everything I have ever done: finishing basic training, finishing AIT, finishing Jump School, my time in the 82nd Airborne Division, graduating OCS, graduating OBC, my 4 year degree, graduating a big city police academy, and I can even prove my 1st and 2nd degree black belt rankings through the ITF. I can prove my 2 Army Achievement Medals, but I don't have the proof of my Good Conduct Medal, but I know it exists somewhere in the records.
The burden of proof falls on your accuser. The time they are going to waste digging up the proof will be revenge enough.

Tell them to show you their VA card/DD-214 on the spot. If they can't tell them to STFU.

Long story short some dude in my neighborhood was trying to start an arm citizens patrol in response to all the chaos right before the January 6 White House incursion, coincidence? I do not live in a high crime area and there’s absolutely no reason for a bunch of tennis club people to be patrolling my streets with automatic weapons and I said as such on the community app we were communicating on. He started bragging about his military career and he was a third-year retiree and referred to himself as a sheepdog. Presumably the rest of us are sheep. So I looked him up on social media and saw that he was basically an Air Force mechanic. No disrespect Air Force mechanics, they perform an invaluable service, but this guy was out of line. Anyway he started investigating me and saw my LinkedIn page Which I hadn’t updated ever. So he started pulling that with me, he got very heated he sent me his address and dared me to show up on his lawn. Anyway, it went pretty far and I do regret the whole interaction, but yeah, I would still like to meet him and kick his butt in a grocery store parking lot. Just on principle.

I would ask them, what do i need to prove to you. I have nothing to prove to them or anyone. Anyone who knows me, knows my story, and what I have done. And then I would kindly tell them to move on, and mind their business. Their are far too many people who never served that think we as Veterans, service members feel we are entitled. Especially when you ask them if they served. As part of roughly 3-5% of America that have served, or serving. Saying that those who never served never understand what any service member has gone through or been though. Those of the 97-95% that never served are entitled. And think they NEED to know if we served or serving. I usually tell them as I walk away, that my son is serving, I served, my father served and retired after 29 years, my grandfather, and so on have served and protected this wonderful country. What my family has done for this country gives you the right to ask and moan about your opinion. I am not trying to sound like an ass, but it is no one's business to ask if I ever served. It is their business to enjoy the freedoms that we who served/are serving protect or protected.

I would laugh and walk away I have nothing to Prove to anyone about my 12 years in the military they are just showing how small minded they are

I am able bodied, so I usually park a good distance away in parking lots even if there is parking spots for veterans. I don't even take advantage of the free meals on Veterans Day. I am retired Air Force and I have a Retiree ID Card, retired veteran License Plates on my car, and Veteran on my Drivers License. So I haven't been accused of Stolen Valor. Then again since I don't actually take advantage of any veteran promotions that a business may have there is nothing to accuse me of in the first place. As far as accusing someone else of Stolen Valor. I really don't care what someone else is pretending to be as long as they aren't harming someone else. Especially in todays age when people are pretending to be everything under the sun. They don't even know what sex they are anymore.