PR card mailed in one envelope or separate?

[USACanada]

I am expecting 3 PR cards, one for myself (as the applicant) and two for my families (as dependents).

I am wondering whether the 3 PR cards will be mailed in one envelope under my name, or separate envelopes for each card?

Any experience?

 

[ramkris]

seperate envelopes with each pr holders name