For the declaration form, everyone gets $800 exemption so a family of four will get $3200.

However one cannot split an individual item into two different people to claim.

All incoming bank transfers over $1000 are reported to CRA or whoever is in charge by the bank as per FINTRAC. Transactions over $5000 require recipient filling out some paperwork.

There is no need to declare when bringing in less than $10,000 cash or EQUIVALENT in negotiable instruments PER PERSON. There are paperwork if you bring in over $10,000.
Failure to declare can result in confiscation and charges.

(From a CBSA senior official)