Im trying to print my wedding invitations and my printer(hp photosmart C5550 all -in-one) keeps telling me that i have a mismatch paper so i tried changing the size the paper type and it still won't print. I need help!!

SOURCE: wedding invitations

go here

SOURCE: paper mismatch

you have to load the printer driver for HP Deskjet 990c. This worked for me perfectly and I'm sitting here printing my wedding invites right now! Good luck!

SOURCE: Paper mismatch error

I got around this problem by tricking the printer.
The paper sensor, on my printer model hp4500 seems to only sense the paper at the beggining of the print job.
What I did to trick the printer to print on odd size paper is slide the paper adjuster to 8.5 and put a regular white sheet in. Then put your odd size paper under it. When you print your document set the number of copies to 2 and print. The printer is going to sense that the paper is correct, and start the job.
Here is the tricky part... once the first 8.5x11 sheet is almost all the way through quickly slide the paper adjuster over to match the size of your odd width paper. The printer should pick up the odd paper and print the second copy. Fool you printa! You should be able to do batches of odd paper size under the first 8.5X11. I hope this helps.
Deny

SOURCE: Can't Print Invitations

There is a workaround for this problem by tricking the printer.
The paper sensor, on my printer model hp4500 seems to only sense the paper at the beggining of the print job.
What I did to trick the printer to print on odd size paper is slide the paper adjuster to 8.5 and put a regular white sheet in. Then put your odd size paper under it. When you print your document set the number of copies to 2 and print. The printer is going to sense that the paper is correct, and start the job.
Here is the tricky part... once the first 8.5x11 sheet is almost all the way through quickly slide the paper adjuster over to match the size of your odd width paper. The printer should pick up the odd paper and print the second copy. Fool you printa! You should be able to do batches of odd paper size under the first 8.5X11. I hope this helps.
Deny

SOURCE: I am trying to print wedding invitations so the

Open the printer software ... go to page setup tab ... specify the size paper you are using ...