a question

[senol]

I would like to learn ifmy below passage are ok or not. especially I want to ask about the using having received structure.
Having received 5 set finished samples from .............CO.,LTD; I undersigned, certify that the goods covered by this certificate are produced by ....................CO.,LTD. according to quality standards which we had agreed with the company and the goods in question are approved to be shipped.
Senol from Istanbul-Turkiye

[Tdol]

I undersigned- I, the undersigned,
company and the goods- company, and that the goods