ESA that one room mate wants the other doesn't - do you approve?

[Edward Tristram]

Not sure what to do.  I have an arguing couple in the first few months of their lease and one now wants an ESA.  The other person appears to have moved out, but is still on the lease.  We have everyone who is on the lease sign off on an ESA request.  THe person who wants the ESA (We allow pets - just not dogs) has the Dr paperwork (their OBGYN), but there is no way the ex is signing off on a 70lb + dog in the apartment they are on the hook for the next several months.  Do we approve it with one signature or just state we need both ...