You need a credit application and contract for your province and Canada. I'd suggest you ask one of your local suppliers for theirs as it's likely compliant with the region's laws. I'd offer mine but it's California. Your original post should have said for Alberta, Canada. Big issue in addressing the proper venue.
To offer terms without the hassle look into receivable factoring or talk to your banker about it. If your clients are big you'll get a deal together.
For a product line at Office Depot we negotiated a factor that funded 80% of invoice face value at the time of our invoice, 20% was held on reserve, fees were $18.75 per thousand if paid on the 60th day (it was $0.325 per day per thousand borrowed if paid earlier), if paid late they would charge the same rate and hold the reserve until paid. fees were taken from the reserve, reserve paid out monthly.
Together we extended a $1 million USD net 60 line to my clients that had a history of "paying as agreed" for the last three years. Net 30 to those who had glitches. They did the credit research for us. They supplied the original application and contract for us to build on.
When the client paid, they cashed the check ( you assign them that authority), they took their fees, and sent us the remaining money.
It worked well. The reserve was essentially our profit margin on many orders.
We used the ability to extend large lines as a tool to grab the big fish in our market. Not to help out existing clients. Gatekeepers scheduled appointments with power buyers almost all the time when told their firm had been granted a million dollar line. We got two national hotel chains, home depot,Procter & Gamble, Office Depot, Comcast, two West coast telcos, three major trucking lines, 3 major national outdoor advertising firms, a dozen regional media outlets, two networks, 5 large casinos, and even one of our suppliers directly from this. The Size of their line of credit was the prime reason they went with us when surveyed.
But we properly set it up, purposefully wrote the contracts and application thru our lawyer. We were so serious about this direction we put him on staff as VP of legal affairs. At the time we did this we were a 2 man shop growing about 20% and grossing $150k. We blew that apart the next year.
its only a freaking sign!