Subleasing: How To Handle Pet Fee

[Art Maydan]

I've got a unit where the tenants bought a house and found a suitable sublease. The current tanants' lease is up in April '18 and I'm holding a $1,750 deposit and collected a $250 pet fee. I've since stopped doing deposits and do move-in fees. The current tenants have two dogs and the new tenants have one of the same size. If I like these tenants, I'll sign a lease in April. Better than than now in the middle of winter and I get to feel them out first.

How would collecting a move-in and pet fee work if we sign a new lease in April? Do I ask the current tenants to collect it and hold it until their lease ends and I give them back their deposit and they give me the fees? Or would the new tenants just pay the fees then? Do I basically treat this like a fresh lease regardless of the fact that they'll already be living in the house?

Thank you,

Art