I sure wouldn't bet on that one! Different areas will have different limitations for possession equating to ownership. In this case, the materials were picked up on behalf of the client. Ownership does not apply because I assume she did not have to purchase them. She was simply acting as an agent. If you abandoned your car in my driveway one set of rules would apply as to when it would become mine. If I picked it up for you after repair you had prepaid for and put it in my driveway for you to pick up 'at your convenience' a whole different set of rules would apply. The client either voluntarily or involuntarily was responsible for getting the lighters out of circulation. The real service involved here was getting defective merchandise out of circulation. This Lisa has done. The threat of putting them back into circulation puts the company and client on notice that absent payment, the merchandise has not sufficiently been recalled.
In a very real and moral sense, Lisa is due payment just for having gotten the product out of circulation. The refusal to allow report entry until the product has been returned is only a bureaucratic piece of safeguard garbage to make certain Lisa is not lying about having gotten the product out of circulation. The failure to provide shipping instructions is bureaucratic dodging of their obligations to pay her for her services. Whether this is deliberate or stupidity is a matter of opinion
While manufacturers or select distributors may be allowed to ship hazardous materials, one of the byproducts of 9/11 is that private individuals can not. That is nothing new. If Certified thought any differently, they did not do their homework. My understanding is that sometimes hazardous materials can be returned to the manufacturer or select distributors with an RMA on a pre-paid label basis. Certified is not such a manufacturer or distributor. If they contracted under the assumption that shoppers could just whisk the stuff into a box, slap a label on it and ship, making payment for shipping at the counter, the error is theirs. That they now require shoppers de-gas the lighters is not appropriate without additional compensation for time, unless it was specified in the original directions as part of the original contract for service.
Obviously if she is deactivated, Lisa has no opportunity to complete the job and file the report. She was ready, willing and able to perform the job EXCEPT for the step of returning the lighters, which was a change to the original contract. She is due payment. Putting Certified on notice that due to deactivation, they have eliminated her ability to complete the assignment and thus she is returning product to the stores causes them headaches because now someone else will need to be hired to go to the stores and pick them up and deal with them. Meanwhile I would personally hope that Lisa does not actually put them back into circulation by returning them to the stores because if they are dangerous and defective, they should be out of circulation.