So I'm waiting for a mouser order, it's over a week, so I go to their website and see that my account is on a credit hold on a paypal paid for order. Turns out they are disputing an order I placed in August of 2025. I paid that order via paypal as well which as you know, you can't even pay less than the order total. The shipping on my paypal receipt is around $13 which seems normal, they are claiming the shipping was actually $40 and I owe them the difference.
So I put these same parts into a cart today and the UPS ground shipping comes up as $39 which seems crazy. I start removing the heavier items to see if that is what caused the issue and finally find the part that created this issue. A single 4 gram tube of heat sink grease mouser # 567-120-SA creates a shipping cost for UPS ground of $36.46!!!
Clearly it didn't have this insane shipping cost at the time of my order, but somehow their system went back over a year, recalculated the shipping costs using this obvious new glitch and they locked my account until I agreed to pay this difference. After being on the phone for over an hour, being shifted to different departments, I finally talked to someone who agreed this was a glitch in their system and released this credit hold.
I have to wonder if this sifting back through old invoices is some new AI powered thing, and likely most commercial accounts would just pay the past due invoice they were sent. This honestly makes me hesitant to purchase from them in the future and the person who sorted this out said "You need to be taking a screen shot of every order before you pay to have evidence if our system changes the invoice AFTER you pay it."
Just a heads up, it appears if you order from mouser you now need to create a folder, and screen shot/save every order invoice before you hit pay to protect yourself from their system changing the invoice in the future and them trying to bill you for it.
Here are screen shots of two shopping carts, one with this 4 gram tube of heat sink compound and one without. Look at the difference in shipping!!


So I put these same parts into a cart today and the UPS ground shipping comes up as $39 which seems crazy. I start removing the heavier items to see if that is what caused the issue and finally find the part that created this issue. A single 4 gram tube of heat sink grease mouser # 567-120-SA creates a shipping cost for UPS ground of $36.46!!!
Clearly it didn't have this insane shipping cost at the time of my order, but somehow their system went back over a year, recalculated the shipping costs using this obvious new glitch and they locked my account until I agreed to pay this difference. After being on the phone for over an hour, being shifted to different departments, I finally talked to someone who agreed this was a glitch in their system and released this credit hold.
I have to wonder if this sifting back through old invoices is some new AI powered thing, and likely most commercial accounts would just pay the past due invoice they were sent. This honestly makes me hesitant to purchase from them in the future and the person who sorted this out said "You need to be taking a screen shot of every order before you pay to have evidence if our system changes the invoice AFTER you pay it."
Just a heads up, it appears if you order from mouser you now need to create a folder, and screen shot/save every order invoice before you hit pay to protect yourself from their system changing the invoice in the future and them trying to bill you for it.
Here are screen shots of two shopping carts, one with this 4 gram tube of heat sink compound and one without. Look at the difference in shipping!!


