Contract for 3 sharers

I have 3 sharers, one of whom is going to pay rent in advance. How do I adjust the contract to state that? Can I issue 3 individual contract, 1 per tenant?

If its a joint tenancy then there is in effect only 1 Tenant, comprising all 3 people and there can only be one contract. As each tenant is individually responsible for ALL the rent, its really up to the tenants to sort out the split and any advance payment between them. Just leave it to them.

I assume you realise that 3 sharers makes the property an HMO?

Are they unrelated or not in a relationship ? You have yourself an HMO and all it’s extra complications if so.