An example is my great grandmother Minnie Estella Miner's delayed birth certificate. Look at the birth date and the date of registration
Full name of Child .........................................................Minnie Estella Miner
Color ...........................................................................White
Sex ...............................................................................female
Name of other living issue living .....................................Harriet M. Hill
Full name of father ....................................................... Reuben F. Miner
Occupation of father .................................................... Deceased
Full name of mother previous to marriage ..................... Mary Lucy Starkey
Hour, day of week of month, and year, of birth .............February 16, 1872
Place, town or township, and county in which born ........Osceola, Polk Co., Wisconsin
Birthplace of father ...................................................... New York State
Birthplace of mother .................................................... New York State
Name of physician or person signing certificate or affidavit.. Lucy H. Baker
Residence of person last named ................................... 112 N Railroad Ave. San
Mateo, California
Date of certificate or affidavit ....................................... June 5, 1939
Date of registration ...................................................... June 26, 1939
Any additional circumstances ........................................
Although this is a birth certificate, the 1880, 1900, 1910, 1920 and 1930 censuses are closer to the actual birthday of 16 Feb 1872. This birth certificate was registered 67 years after the fact and her eldest daughter is listed as the person signing the certificate. The delayed certificate did not have any documentation with it. I have delayed birth certificates for her children born in North Dakota and all of those have documentation to support the information.