Gold certificates aren't "on" bills. They were bills themselves and were backed by an equivalent amount of gold on deposit with the US Treasury. You could take one to a bank and receive that amount of gold in return.
To clear things up, you won't find any gold certificates in change. The last gold certificates were issued in 1928, and five years later the US withdrew both them and gold coins from circulation. Any current bill you have, regardless of its denomination, will be a Federal Reserve Note.
In any case a gold certificate would be easy to recognize. Most of the ones issued in the early part of the 20th century, and all that were issued in 1928, have the words GOLD CERTIFICATE on them, and the seal and serial numbers are gold-colored.
Click on the link named " $100,000 dollar bill" in the "RELATED LINKS" section located along the left side of this box and you will see the $100,000 dollar bill.
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Your bill is most likely a 1905 $20 gold certificate. If correct, please see the question "What is the value of a 1905 US $20 gold certificate?" for more information.
Any red-seal US $2 bill dated 1928 or later is a United States Note and not a certificate. Certificates were exchangeable for silver or gold, and carried the words Silver Certificate or Gold Certificate across the top. Please see the question "What is the value of a (date) US 2 dollar bill?" for more information, where (date) is your bill's series date.
Please check your bill again. As the banner across the top indicates, it's a silver certificate, not gold. All gold certificates were withdrawn in 1933. There's more information at the question "What is the value of a 1957 US 1 dollar silver certificate?"
Please check the banner across the top of your bill. It should say United States Note, not gold certificate. There's never been a $2 Gold Certificate and in any case, all gold certificates of any denominations were withdrawn from circulation in 1933. There's more information the at question "What is the value of a 1963 US 2 dollar bill?".
There were no $1 gold certificates. If your bill has a yellow seal it's a special note issued during WWII for use by troops in North Africa.
It's a $10 gold certificate, which was a type of U.S. currency until 1933. It could be redeemed at a bank for gold coins.
Not every old bill is automatically a certificate so it's important to check carefully. If it has a gold seal and says "Gold Certificate", see the question "What is the value of a 1928 US 10 dollar gold certificate?" for values. If it has a green seal and says "Federal Reserve Note", it's not a certificate, it's a Federal Reserve Note. See the question "What is the value of a 1928 US 10 dollar Federal Reserve Note?" for values.
Please don't assume that every old bill has to be a silver certificate. 1928 $10 bills were issued as gold certificates with gold seals and as Federal Reserve Notes, with the familiar green seal and the words "Federal Reserve Note" across the top.Please check the bill's seal color and wording across your bill's top front; then see one of the following questions:"What is the value of a 1928 US 10 dollar Federal Reserve Note?""What is the value of a 1928 US 10 dollar gold certificate?"
The United States did not print a 1915 $10,000 gold certificate.
Please post a new, separate question with the bill's date.