Splitting cost with tenant on addition of blinds in house

[Pawan A.]

Hi,

I am first time landlord. My tenants are asking me to add few blinds to windows and have agreed to split the cost 50:50. My questions are:

1) What kind of addendum do I make them sign to make sure they understand this improvement will stay with the property even after they leave.

2) What kind of receipt do I give them for this cost? Is this just part of rental reciept (ie one months rent is slightly higher) or is there some specific kind of reciept for this?

Thanks!

[Matthew Paul]

Why would you pay for the tenants decorations?