Urgent question- Tenants sign new lease prior to closing?

[Amanda G.]

This is the counter offer I received:
We want to counter your offer in hopes we can work with you. We have requested highest and best and the other offer is higher. With that being said we would prefer to work with you because you do not intend on occupying the property and this would not disturb the tenants, which is of benefit to you and the seller. Below is our counter to you. Please let us know by 5 pm today. thanks and we look forward to your response.
Conditions are price, selling as is, reasonable closing period and then:
"Tenants to sign new leases with buyer prior to closing."

This strikes me as weird. I thought leases carry over with a purchase? The seller told me everyone was on a lease, would you guess that this was not true? What do you think is going on here?

[Colleen F.]

You get estopell letters specifying deposits terms etc. of the current lease and signed by you and the tenant. The seller has to transfer the deposits. at closing. You are not collecting new deposits out of these tenants. They also transfer prorated rent at closing. Ask your lawyer this should be good enough and i think can be written to start at closing but signed before.