What are some common misconceptions about JTR?

Common misconceptions about JTR Joint Travel Regulations include thinking JTR applies to all federal employees, that you can claim anything without receipt, and that JTR is optional. First misconception is JTR applies to all federal employees, actually JTR applies only to Uniformed Services and DoD civilians, while other federal agencies use Federal Travel Regulation FTR, though JTR incorporates FTR. Second misconception is contractors must follow JTR, actually contractors are governed by FAR and contract terms, JTR only applies if contract says travel will be reimbursed per JTR rates. Third misconception is you can claim up to 75 dollars without receipt for everything, actually lodging always requires receipt regardless of amount, and airfare and rental car always require receipt. Fourth misconception is per diem is actual expense, actually lodging is actual up to rate, but meals and incidental expenses M&IE are flat rate, no receipts. Fifth misconception is you can take personal travel on government dime, actually any personal travel combined with TDY must be at no extra cost and approved. Sixth misconception is JTR allows business class, actually economy is required, business only for flights over 14 hours or medical need with approval. Seventh misconception is JTR is outdated, actually JTR is updated monthly by Defense Travel Management Office and very current. So common misconceptions stem from confusing JTR with FTR and misunderstanding receipt and class rules.