"The Postal Service is unable to assure that a Business Reply Mail piece will only be used in a manner and for the purpose intended by the distributor; this is

"The Postal Service is unable to assure that a Business Reply Mail piece will only be used in a manner and for the purpose intended by the distributor; this is a risk assumed by the distributor. If the piece receives postal handling, the legal rate of postage and appropriate fee should be collected for the service given the piece upon delivery to the distributor. The fact that a returned BRM envelope may be empty or a BRM card may not have been completed has no bearing on the distributor's obligation to pay postage and fees on all returned BRM pieces." So if you just send back the empty envelope, it sounds like it will cost the company postage, even if it's less than a brick.