If in doubt, get it proofed. The bell-ringing home test is a good one, a 'riiiiinnnngggggggg' is good, and a 'dunk' is bad, but......
Both proof houses will issue certificates to accompany the gun in lieu of a profusion of new stamps all over the barrel and action, but just might apply a VERY small stamp where it cannot ordinarily be seen. In any event, you will be taking/sending only the barrelled action sans woodwork.
tac