There will be changes to account numbers which will include some of the digits from the old number.  Account numbers will change from a 16 digit to a 10-digit number. See examples below:

Last 8 digits of current number plus prefix, 13

Savings account – 1400011071317257 (old number) to 1371317257 (new number)
Chequing account – 1800010020031433 (old number) to 1320031433 (new number)
Term Deposit – MM1508400321 (old number) to 1308400321 (new number)