Interesting discussion. I think the whole proof idea, is good on paper, but as others have said, there will be people who have PTSD but cannot prove criteria A. While I hate the idea of people fraudulently claiming compensation or disability, by claiming they have PTSD, actually having to prove you have endured trauma to get the right help and treatment sounds quite scary to me.
I cannot prove I was raped, by a stranger, at knife point in a public place in 1993. No one saw me, I didn't report it to the police, and I didn't tell anyone for years afterwards. I went into complete denial, and put it all in a locked box, in the back of my brain somewhere. I'd never even heard of PTSD, or thought that I'd be storing up issues for the future. Although now that I know about PTSD, I can look back and see that I had some symptoms and behaviours of PTSD (risky behaviours (promiscuity), easily startled, hypervigilance, occasional anxiety attacks - the nightmares, flashbacks, insomnia, depression etc didn't surface until years later. Although, I told a boyfriend I had 'been assaulted, in the worst way he could imagine', following a hysterical, sobbing, anxiety attack during sex, we never openly talked about it again. The first person, I ever told officially, was my GP around 2001. And that was to describe my symptoms, which by then also included suicidal thoughts, and eventually I told him (actually by writing it on a piece of paper - because I couldn't say the words out loud) I was raped. In 2002 I was seen by 2 different psychiatrists, 2 sessions with both, if I recall, and I was diagnosed as having (delayed onset) PTSD.
I cannot prove in any way that this happened to me. Except I imagine by a lie detector. Having had 9 years to learn about PTSD, accept my diagnosis, and learn to say those words "I was raped" out loud, if I were now needing to claim disability or benefits, or a claim for discrimination, or any other legal needs pertaining to PTSD, then I would take a lie detector test, if it was deemed necessary.
Back in 2001, it took my GP months to get me to open up enough to tell him what my nightmares and flashbacks were about. It then took further weeks/ months for him to persuade me to see a psychiatrist. I was absolutely terrified that I was going crazy, and that a psychiatrist would confirm that I was indeed mad. If I had gone to the psychiatrist and been told that I would have to take a lie detector to prove that I had indeed been raped, I honestly think that I would have run for the hills. Because of overwhelming feeling of shame, humiliation, self-blame, guilt, embarrassment etc, etc, that all go along with being raped, actually admitting it, was (and still is) a massive deal. To be then told, that just my word wasn't enough, and that I had to prove that I was raped, would have been completely horrendous. I don't think I could have dealt with that at all. Clearly, this is just my opinion, based solely on my own circumstances.
Having read plenty of accounts of child abuse on SSA, so many children who are abuse are told not to tell anyone, and that no-one would believe them anyway. And often the children who have spoken out have not been believed, or dismissed - I can't imagine how being told they have to prove they were abused would affect them.
For the genuine PTSD sufferer, many are pretty much at rock bottom, by the time they actually seek help and get that diagnosis. As we read here in the 'introduction' section all the time, many are grateful that they have a diagnosis, and to discover that they are not alone with their symptoms, and they are in fact having a 'normal reaction to abnormal events' and not indeed going crazy! As we know a lot of PTSD sufferers have issues with trust. Having to prove your trauma (when you are already rock bottom, and logical thinking is generally skewed ) sends the message that you are not believed. If the professionals don't trust you (the sufferer), then you are not going to trust the sufferer.
I think that for the genuine sufferer, having to prove their trauma, during initial assessments could be seriously detrimental. And holding out on a diagnosis, until a time that its more appropriate to get proof may prevent getting the appropriate treatment. For example, if PTSD is not diagnosed, the patient may not get a referral to a trauma therapist, or an EMDR therapist.
It would be great to sieve out those just claiming to have PTSD for their own monetary gain, but some dishonest people will always beat the system somehow.
I don't think that proving your trauma at the time of initial assessment/diagnosis is appropriate. Once PTSD is being used for legal purposes, maybe then is the time to seek for proof. But I don't suppose that legalities work that way?