The short answer: declarations instead of a vaccine card
A Mongolian gerbil usually needs no vaccination proof for boarding, because gerbils are not routinely vaccinated against anything. Boarders who accept gerbils ask instead for a signed health declaration, details of his bonded companion, your vet's contact information, an emergency contact, and written consent for them to arrange veterinary care if he becomes unwell during the stay. Since many mainstream boarders do not take gerbils at all, the paperwork conversation starts with finding a facility — usually an exotic or home boarder — and getting its own intake form completed accurately.
The health declaration for a gerbil
Expect the declaration to ask whether your Mongolian gerbil is digging, tunnelling, and eating normally, whether his coat is smooth and full, and whether there is soreness or wetness around his nose. That nose question is gerbil-specific: gerbils produce a red-tinged secretion and can rub their faces sore, especially when bedding irritates them, so boarders watch for a worsening sore patch. Note any bedding he reacts to — strongly scented or dusty products trouble gerbils — and state plainly which bedding he uses at home, because a facility that swaps him onto a scented product may create the very problem the form asked about. Disclose any recent change honestly: a gerbil who has gone quiet, stopped tunnelling, or lost weight should be declared and discussed, not quietly boarded.
The pair-bond clause his paperwork must carry
The most important line on a Mongolian gerbil's boarding form is not medical at all: he boards with his companion, stays with his companion, and is never separated from or introduced to other gerbils during the stay. Bonded gerbils recognise each other by scent, and a separation followed by a scrubbed-clean reunion can trigger declanning, where the pair no longer accept each other and may fight seriously. Write the companion's description on the form, note which animal is the more confident of the two, and ask the boarder to confirm in their reply that the pair will be housed together in their own tank throughout. If the facility's form has no field for it, add it yourself in the notes — this is the detail that protects your gerbils most.
Vet details and treatment consent
Complete the consent section so the boarder can act without chasing you: authorisation to transport him to a named vet and approve necessary care if you cannot be reached, with costs to you, plus your mobile number and a backup decision-maker. Name a vet who actually treats gerbils where you can — exotic-pet practices do, and some general practices will say honestly that they do not. If he is on any treatment your vet has prescribed, write the instructions onto the form in full rather than relying on a labelled container alone, and note the time of day he is used to being handled, since gerbils resent being dug out of a burrow mid-sleep.
Confirming the boarder's arrangements in writing
Before the stay, ask how the gerbils will be housed and cleaned: a good exotic boarder knows that a full tank clean midweek destroys tunnels and washes away the pair's scent, unsettling them, and will spot-clean instead. Ask whether they supply bedding or expect yours, and whether their intake form needs returning before arrival. Get their answers in writing, keep your copy of the signed declaration with the tank when you drop them off, and the gerbils' part of the bargain — a familiar-smelling tank and each other — stays intact for the week.
Storing your Mongolian gerbil's declaration, companion details, and consent form in KinsLe's Pet Passport keeps his boarding proof together in a single portable packet, so a specialist boarder gets everything in one handover.