How can a sub-contractor collect on a bill owed by a business?

[Genesis]

I am an electrical contractor who finished an job(extra work/change order)for a restaurant in South Florida that was not part of the original contract. The work was done according to code and satisfaction of the owner. The bill was sent in the beginning of November of last year and has not yet been paid. The job was done through the general contractor, who has tried to collect payment and is know seeking legal remedies. However, I would like to know my legal options in order to pressure the owner of the restaurant. Also, what can I do in the future to protect myself from extra work/change orders which are not part of the original contract from irresponsible clients.

 

[HomeGuru]

In the future have the GC or the owner sign a change order form agreeing to the extra cost and payment for same. The form should state that all conditions of the change order work falls under the original contract.

Threaten to file a mechanics lien. Does the restaurant own the land? If they just lease the land, then contact the landowner because if a lien is filed, the landowner is affected.