For a spouse, a marriage certificate; for children, birth records showing both the relationship and the age. Passports establish citizenship, which determines which procedural steps apply. Documents not in English may need translation, which is a different service from a credential evaluation.
Gather civil records before the immigration file
Civil registries can be slow, and replacing a lost certificate takes longer than most families expect. Order certified copies early rather than relying on photocopies of unknown provenance. Check that names match across passports and certificates, since a discrepancy caused by a name change is easier to document at home than to explain later. Keep each person's records in their own set.
A credential evaluation does not resolve an unexplained identity mismatch by itself. An anonymised task description may explain the role without exposing client property records. A translation should reproduce the record faithfully rather than silently substitute the new name. Preserve the original and explain the name history with reliable supporting records. Where a foreign-credential evaluation is required by the regulation, include it. Where a Canadian company supplies the services, invoices and corporate records should match the letter so the officer can see who employs the professional.
Place the records side by side and identify given names, family names and any separate naming fields.