Is this sentence grammatically correct - We would appreciate your signing and forwarding the enclosed?

The sentence is grammatically correct, but it could be improved for clarity and flow. Here are two options:

Option 1 (More formal):

* "We would appreciate it if you could sign and forward the enclosed documents."

Option 2 (More informal):

* "Please sign and forward the enclosed."

Both options are grammatically correct and convey the same meaning. Choosing the best option depends on the formality of the context and your relationship with the recipient.