The legitimacy of today's Kohen pedigree

Hi,

"I have seen someone write that in our day, when we don't have documented lineage for our kohanim, it would be appropriate for each kohen to be concerned that perhaps he may not be a kohen, and so he should return the redemption funds given to him in Pidyon haBen, and he may be obligated to separate money for himself for his own redemption. In my opinion, though, it is prohibited to hear such things, to reduce the level of the kohanim and cause their degradation. Gd forbid that one should say such a thing…."

[He then continues to bring halachic proof to his point.]

(R' Yechiel Michel Epstein, Aruch haShulchan Yoreh Deah 305:55)

Have a great day,
Mordechai