The short answer: no vaccines, a small but real paper trail
A Roborovski dwarf hamster usually needs no vaccination proof for boarding, because pet hamsters are not routinely vaccinated. What a boarder asks for instead is a short, practical packet: a signed health declaration, your contact details and an emergency decision-maker, your vet's information, and written consent for the facility to arrange veterinary treatment if he becomes unwell while you are away. For a Roborovski, the care notes attached to that packet matter as much as the signatures, because his size and temperament shape how staff should handle his stay.
The health declaration for the smallest hamster
The declaration confirms what you can honestly observe in a Roborovski dwarf hamster: that he is emerging in the evenings and running as usual, eating his seed mix, drinking, and passing dry droppings, with no bald patches, persistent scratching, discharge around the eyes, or wetness under the tail. Robos hide frailty well and are rarely handled closely, so base your answers on his activity pattern across several evenings rather than one quick look. If he has slowed down, is sitting out in the open during the day looking unsteady, or has lost enthusiasm for the wheel, declare it and talk to the boarder — and your vet — before the stay rather than boarding an unwell hamster and hoping the week passes quietly.
Why the care notes are part of his proof
Boarding paperwork for a Roborovski should carry handling instructions in unambiguous terms: this is a very fast, shy hamster who is observed rather than picked up, who should be moved only inside a tube or mug if movement is unavoidable, and whose enclosure must be opened only over a secure surface. State that his enclosure is escape-proof with fine ventilation and a latching lid, and that it should not be swapped for a barred cage with wider spacing during the stay — a Robo can squeeze through gaps that hold every other hamster species. Note his sand bath as daily equipment rather than an optional extra, since desert hamsters maintain their coats by rolling in sand, and list his seed mix and the tiny fresh extras he is used to so staff do not improvise rich foods for a very small digestive system.
Vet details, consent, and who decides
Complete the consent form so the boarder can act fast: authorisation to take him to a named vet and approve necessary treatment if you cannot be reached, costs to you, your mobile number, and a backup contact. Name an exotic or small-mammal vet if you have one, because a Roborovski needs a practice comfortable treating a hamster of his size. If he is receiving any treatment your vet has prescribed, write the instructions onto the form in full. Given how small he is, also agree with the boarder how they will check on him — a visual evening check that he has emerged and is moving normally disturbs him far less than daily handling to 'make sure.'
Confirming the boarder accepts Robos at all
Many boarding facilities have never housed a Roborovski dwarf hamster, and some will decline once they understand the escape risk, so confirm acceptance specifically rather than booking 'a hamster' and arriving with the tiniest species in the family. Ask for their intake form in advance, whether they house him in his own enclosure — they should — and what their quiet-hours arrangement is, since a nocturnal boarder placed under reception lighting all night will spend a miserable week. Their answers, in writing, plus your signed packet, complete the proof he needs.
Filing your Roborovski's declaration, vet details, and escape-proofing notes in KinsLe's Pet Passport keeps his whole boarding packet in one portable place, so even the smallest guest's paperwork is complete.