The law says
IRPA s. 107(1)The Refugee Protection Division shall accept a claim for refugee protection if it determines that the claimant is a Convention refugee or person in need of protection, and shall otherwise reject the claim.
No credible basis
(2)If the Refugee Protection Division is of the opinion, in rejecting a claim, that there was no credible or trustworthy evidence on which it could have made a favourable decision, it shall state in its reasons for the decision that there is no credible basis for the claim.
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