In my experience i used to buy alot of things online(not even seeds) with a debit card and they seem to have the highest risk.
I have had to call my bank over random fraudulent charges on my debit card atleast 3 times in a 2 year period before. My bank took care of it free of charge everytime.
After that i realized credit cards are alot safer for protection against that kind of thing and i maybe have only had that problem once or twice in a four year period with a credit card.
I have used my credit card to purchase from seedsman, herbies, autoflower portal, and mephisto and have not had any problems.
I did have to call my bank and get them to unblock the transaction from herbies or seedsman(forget which one) so that it would accept the charge.
For ordering directly from mephisto you shouldnt have any issues no matter how you pay. You can use pa*pal with them too.
I hope this answers your question.:smiley1:
Hues the plants looking good!