Mixed submissions are sometimes possible, but the right answer depends on the grading company, service level, card type, declared value, and shop workflow. A modern Pokémon chase card, a vintage baseball card, an autograph, and a thick patch card may not belong in one order even if the same company accepts all of them. Ask nearby grading submission shops whether they batch by category, service level, value, or customer, and whether separating orders changes the total cost.
Keep categories organized before you arrive. Label cards clearly, photograph both sides, and separate anything oversized, autographed, altered, damaged, or unusually valuable. The prep cards for grading guide covers practical packing and screening steps. A shop that understands both Pokémon and sports can help spot category-specific concerns, but it should still follow the grader’s current instructions. Convenience is useful only if it does not create paperwork confusion or service-tier mistakes. Clear separation also makes it easier to spot a missing card before the order leaves town.