Experience does not automatically replace a required degree or proof of that degree. First determine whether the degree was completed and which credential route the profession allows. If the category requires a degree, a strong career history alone is not a universal substitute for the academic requirement.
Separate eligibility from the proof problem
If the credential exists, focus on obtaining reliable replacement evidence. If it was never awarded, assess whether the actual category has a permitted alternative that you meet. Do not presume that a credential evaluator can combine incomplete education with experience into the necessary TN qualification.
A résumé may help explain the sequence of events, but it does not itself verify a credential. Resolve this distinction before asking the employer to state that you meet a requirement it has not seen documented. Separate two questions that a long career tends to fuse.
The first is whether the profession under consideration permits experience to satisfy its credential requirement at all, which is determined by the category itself and not by how much experience has been accumulated. The second is whether the specific documents evidencing the qualification can be produced. Where the category requires a degree and the degree was obtained, the difficulty is documentary and generally solvable with time.
Where the category requires a degree and none was obtained, experience does not fill the gap however substantial it is, and the conversation should move to whether a different listed profession fits the position or whether another classification should be considered. Establishing which of the two situations applies is the first useful step and it is frequently skipped.