False personating of the true owner of the land and other instruments.
2.Forged deeds, releases of mortgages and other instruments.
3.Instruments executed under fabricated or expired powers of attorney. (Death or insanity of principal.)
4.Deeds apparently valid but actually delivered after death of Grantor or Grantee, or without consent of Grantor.
5.Deeds to or from corporations before incorporation or after surrender or forfeiture of charter.
6.Undisclosed heirs.
7.Misinterpretation of Will, Deed or other instrument.
8.Deeds by persons of unsound mind.
9.Deeds by minors
10.Deeds by aliens.
11.Deeds by persons apparently single but actually married.
12.Birth or adoption of children after date of will
13.Children living at date of Will but not mentioned therein.
14.Mistakes in recording legal documents. (Incorrect indexing, errors and omissions in transcribing and failure to spread of record or preserve original instruments.)
15.Want of jurisdiction of persons in judicial proceedings.
16.Discovery of Will of an apparent in testate.
17.Discovery of later Will after probate of first Will.
18.Federal Estate and gift tax liens.
19.State Inheritance and gift tax liens.
20.Capacity of foreign personal representatives and trustees to act.
21.Failure to include necessary parties in judicial proceedings.
22.Claims of creditors against property conveyed by heirs and devisees within prescribed time after owners' death.
23.Deeds absolute on their faces but which are hold to be equitable mortgages.
24.Deeds in lieu of foreclosure set aside as being given under duress.
25.Ultra vires deed given under falsified corporate resolution.
26.Outstanding prescriptive rights not of record and not disclosed by survey.
27.Conveyance and proceedings affecting rights of servicemen protected by Soldiers' and Sailors' Civil Relief Act.
28.Deed of property recited to be separate property of Grantor which is, in fact, community property.
29.Errors in tax records. (For example, listing payment against wrong property.)
30.Deed from bigamous couple  prior existing marriage in another jurisdiction.
31.Deed from convicted felon.
32.Conveyance by heir, devisee or survivor of a joint estate who murdered the decedent.
33.Defective acknowledgement due to lack of authority of notary (acknowledgement taken before commission or after expiration of commission.)
34.Federal condemnations without filing of notice. (Federal law does not require filing of notice of taking in local recording office.)
35.Rights under Financing Statements filed under Uniform Commercial Code in the name of the debtor who may not be the owner of the property.
36.Record easement, but erroneous ancient location of pipe or sewer line which does not follow route of granted easements.
37.Demolition liens where city demolishes building under statutory authority which are not recorded or are not recorded against the true owner.
38.Descriptions apparently but not actually adequate.
39.Fraudulent changes in existing records by persons other than recording officials. Changes in record by recording official without authority upon oral request or upon being presented with instrument changes after executions and recordation.
40.Ineffective waiver of tax liens by tax or other governing authorities repudiated later by successors.
41.Corporation franchise taxes as lien on all corporate assets, notice of which does not have to be recorded in the local recording office.
42.Wills revoked by marriage after executions when marriage not contemplated by terms of Will.
43.Special assessments where they become lien upon passage of resolutions and before recordation of commencement of improvements for which assessed.
44.Interests arising by Deeds to fictitious characters to conceal illegal activities on the premises.
45.Erroneous reports furnished by tax officials, but not binding on municipality.
46.Administration of estates and probate of Wills of persons absent but not deceased.
47.Undisclosed divorce of spouse who conveys as sole heir of deceased consort.
48.Marital rights of spouse, purportedly but not legally divorced.
49.Tax homestead exceptions set aside as fraudulently claimed.
50.Break in the chain of title beyond period of examination of public records where running of adverse possession statute has been suspended. (True owner is incompetent, absent or incarcerated or title is held by the sovereign.)
51.Deed from Trustees of purported business trust which is, in fact, a Partnership or joint stock association.
52.Deed of executor under non-intervention Will when order or solvency has been fraudulently procured or entered.
53.Deed from record owner of land where he has sold property to another purchaser on unrecorded land contract and purchaser has taken possession.
54.Void conveyances in violation of public policy. (Payment of gambling debt, for contract to commit crime or made in restraint of trade.
55.Duress in execution of instruments. (From Chicago Title Insurance Company)