Don't waste time with a redress - it will have to be paid back.
Here is a link that will help if you have access: http://www.admfincs-smafinsm.forces.gc.ca/cfa-oaf/203-03-eng.asp
and if you don't then a little info:
QR&O 203.04 requires that every officer and non-commissioned member be acquainted with the rates of pay, allowances and other financial benefits and expenses to which they may be entitled, and with the conditions governing their issue.
and the big section you need:
CFAO 203-3
SECTION 2 -- EXTENSION OF RECOVERY PERIOD
7. Recovery of an overpayment, advance of unearned pay and allowances, or deduction for dependants' medical care or dental treatment shall normally be made either in one sum or by monthly deductions in the pay account. In the case of monthly deductions, the amount may be recovered over the greater of:
a. a period not exceeding six months; or
b. a period equal to the period over which the overpayment was made.
The accounting officer shall notify Director Pay Services 5 (DPS 5), by message, of the recovery period and rate.
8. If a recovery period that exceeds the CO's authority is considered warranted, the CO shall submit a request to the parent command headquarters (CHQ) including:
a. the amount to be recovered and details of the circumstances which led to the overpayment, efforts, if any, the member made or should have made to prevent or minimize the overpayment and action taken to prevent recurrence of a similar overpayment;
b. the recommended rate and period of recovery -- the recovery rate which, based on assessment of the member's financial situation will liquidate the debit balance as soon as possible without causing the member undue financial hardship;
c. confirmation that recovery is being made currently at the rate recommended for approval in subparagraph b, and the recovery commencement date; and
d. a detailed statement supporting the recommendation for extended recovery at subparagraph b. The statement shall show the member's gross pay and allowances, recurring deductions and budgeted monthly expenditures.
9. The parent CHQ shall review the request, make sure it is properly documented, add its recommendation, and then send it to NDHQ/DPS for decision.
10. The decision to approve or deny an extended recovery period for an overpayment, advance of unearned pay and allowances, or deduction for dependants' medical care or dental treatment is based primarily on the member's ability to repay. For an overpayment, the decision is also influenced by the circumstances leading to it, in particular the member's action, if any, required under paragraph 4. Submissions received by NDHQ/DPS with insufficient information will be returned through the parent CHQ to the unit for further substantiation.
Now for my recommendation:
Do a memo to the CO/Compt requesting that the recovery be done over a period equal to the period over which the overpayment was made. I highly doubt you will get a better deal - I have never seen one given. Address it through the pay office and get it done yesterday. Once they have received it all recovery action should stop until they get the response back. This can be important because sometimes the answer takes several weeks giving the member a bit of breathing room to prepare for the lost pay. Remember you will be losing the PLD amount off your pay plus paying back what you were paid - ie if you recieved $100 a month you lose $200 plus a month.
If you can prove that it will cause extreme and unreasonable hardship on your family then by all means try for a longer period. Note that not being able to afford rogers extreme internet does not qualify. You would have to prove that you could not afford the basics of life.
and a correction - note that no where in there does it say you are entitled to repay the amount over the period it was overpaid. You can request it and the CO (although I have always seen the Compt) can (and always has) approve it. If they were to do one lump then a redress would most likely pass as I am sure you could argue the amount would meet the test of the above paragraph.
Now get that memo in. here is a basic format (I just know someone is going to jump on something - havent done a memo in awhile):
7000-1 (PERS)
DATE
CO (thru Fin O)
RECOVERY OF PLD OVERPAYMENT
Refs: A. email subj from/to date
B. CFAO 203-3 section 2 Para 7 (b)
1. I, rank name sn, hereby req recovery in ref A be actioned IAW with ref B.
2. Request the recovery be actioned starting month year over xxx pay periods that corresponds to the period of the overpayment. If approved I also req that the pay office notify me of the monthly amount to be deducted and my net monthly pay so I can properly budget.
3. For your consideration and approval.
respectfully;
<sign>
name
rank