OPINION BY
¶ 1 Dеmingo Lamar Williams (“Williams”) appeals from the judgment of sentence imposed following the trial court’s revocation of his probation. We reverse in part, vacate in part, and remand for further proceedings.
¶ 2 In January 2005, the Commonwealth charged Williams, in two separate informa-tions, after he had allegedly sexually assaulted his eleven-year-old step-daughter and six-year-old son. Each information charged Williams with three separate counts, including rape of a child as to his step-daughter and endangering the welfare of children as to his son. 1 Williams entered a negotiated guilty plea, and the Commonwealth withdrеw these two counts. Williams pled guilty to the four remaining offenses (ie., two counts each of indecent assault and corruption of minors). 2 On January 10, 2006, the trial court imposed a prison sentence of one year less a day to two years less two days, plus a three-year probationary term, on Williams’s convictiоn of corruption of minors in one information, and imposed an identical, concurrent sentence as to his conviction of indecent assault in the other information. 3 Regarding the two remaining convictions, the trial court imposed no further penalty (collectively “the NFP Sentences”).
¶ 3 Approximately two yеars later, Williams again appeared before the same trial court judge after having violated the conditions of his probation. 4 After consid *1207 ering argument from the Commonwealth and Williams’s prior counsel at a probation violation hearing, the trial court revoked Williams’s probation, 5 and sentenced him to an aggrеgate prison term of ten to twenty years. Specifically, as to the two underlying convictions on which Williams had originally received probationary sentences, the court re-sentenced Williams to two consecutive prison terms of two-and-one-half to five years. Significantly to this appeal, the court also sentenced Williams to two additional, consecutive prison terms of two-and-one-half to five years (collectively “the Contested Sentences”) on the previously imposed NFP Sentences.
¶ 4 Williams timely filed a Notice of appeal. Williams subsequently filed a Motion to vacate the Contested Sentences, asserting that they were patently illеgal. 6 The trial court denied this Motion.
¶ 5 On appeal, Williams raises the following issues for our review:
1. Did the probation violation court sentence illegally when it not only sentenced [Williams] to two consecutive terms of 2)Nto-5 years of confinement on two counts for which terms of probation were originally imposed two years earlier, [but] it alsо sentenced [Williams] to two additional consecutive terms of 2]4-to-5 years of confinement each on two other counts for which sentences of guilt-without-punishment had originally been imposed?
2. Were [Williams’s] due process rights violated (A) when the probation violation court considered, as evidence at his probation violation hearing, notes of testimony from a civil case held in another county, notwithstanding the fact that said notes of testimony were never introduced as evidence at the probation violation hearing, and (B) when the probation violation court relied solely upon the aforementionеd out-of-county notes of testimony in deciding if [Williams] had violated a “no contact” order (notwithstanding the fact that [Williams] denied having violated that “no contact” order, and even though the notes of testimony that contradicted him came from a civil case to which he was not a party and from a hearing at which he was not present, was not represented by counsel, and was not provided with the opportunity to present evidence or cross-examine witnesses)?
3.Was [Williams] left constructively without counsel at his probation violation hearing, given the failure of his attorney (A) to object to the probation violatiоn court[’s] considering as evidence a document — specifically, notes of testimony from [ ] a Mercer County contempt of court hearing — that was not admitted into evidence at the probation violation hearing; (B) to object to the probation violation court[’s] deciding whether [Williams] had violated а “no contact” order based entirely on the aforementioned document (such reliance being impermissible since *1208 [Williams] was not a party to the Mercer County proceeding and was not present, was not represented by counsel, and was not provided a chance to present evidence, or cross-examine witnesses at the Mercer County hearing); and (C) to object to the probation violation courtf’s] imposing illegal probation violation sentences on [Williams] on counts on which [he] had originally received 42 Pa.C.S. § 9721(a)( [2]) guilt-without-punishment sentences?
Brief for Appellant at 5-6 (some capitalization omitted).
In considering an appeal from a sentenсe imposed following the revocation of probation, our review is limited to determining the validity of the probation revocation proceedings and the authority of the sentencing court to consider the same sentencing alternatives that it had at the time of the initial sentencing. Revocation of а probation sentence is a matter committed to the sound discretion of the trial court and that court’s decision will not be disturbed on appeal in the absence of an error of law or an abuse of discretion.
Commonwealth v. Ahmad,
¶ 6 In his first claim, Williams argues that the Contested Sentences are illegal
7
and must be vacated since the trial court did not have the authority to re-sentence him on the NFP Sentences.
See
Brief for Aрpellant at 18-20. According to Williams, the disposition in this case is directly controlled by this Court’s decision in
Commonwealth v. Smith,
¶ 7 Likewise, the Commonwealth agrees that the Contested Sentences are illegal and that Smith is controlling. See Brief for the Commonwealth at 8-13. The trial court, however, determined that the Contested Sentences are valid and thаt Smith has been overruled by later case law, discussed in detail below. See Trial Court Opinion, 2/29/08, at 2-3. After a thorough review, we conclude that the trial court imposed an illegal sentence.
¶ 8 In
Smith,
the appellant had previously pled guilty to simple assault and possession of an instrument of crime (“PIC”).
Smith,
¶ 9 On appeal, the appellant in Smith argued that (1) the trial court did not have the statutory authority to re-sentence her on the PIC conviction, and (2) this sentence violated her double jeopardy rights. Id. The Smith panel agreed with the *1209 appellant on both grounds, stating as follows:
A detеrmination of guilt without further imposition of penalty constitutes a final, appealable order. Commonwealth v. Rubright,489 Pa. 356 ,414 A.2d 106 (1980). A trial court may alter or modify a final order within thirty days after its entry, if no appeal is taken. 42 Pa. C.S.A. § 5505; Commonwealth v. Quinlan, [433 Pa.Super. 111 ,639 A.2d 1235 , 1238 (Pa.Super.1994) ]. Once the thirty-day period for altering or modifying sentence is over, the trial court loses power to alter its оrders. Commonwealth v. Dasilva [,]440 Pa.Super. 291 ,655 A.2d 568 (1995); Commonwealth v. Quinlan, supra. Furthermore, a modification of sentence imposed on a criminal defendant which increases his punishment constitutes double jeopardy. Commonwealth v. Coleman,271 Pa.Super. 581 ,414 A.2d 635 (1979); Commonwealth v. Silverman,442 Pa. 211 ,275 A.2d 308 (197[1]).
Although the trial court acted within its power when it revoked appellant’s probation and resentenced her for the simple assault conviction, the trial court erred when it resentenced appellant for the PIC conviction. First, the trial court had already issued a final sentence for the PIC conviction in the form of a guilt determination without further penalty. The thirty-day period in which it could have altered the sentence expired, and the appellant did not appeal. Therefore, the trial court did not have the power to alter or modify the no-further-penalty sentence it had initially imposed upon appellant. See Commonwealth v. Dasilva, supra; Commonwealth v. Quinlan, supra. Thus, the increased punishment appellant received for her PIC conviction following her re-sentencing for violating her probation for the simple assault conviction constituted a denial of appellant’s constitutional right not to be subject to double jeopardy. See Commonwealth v. Coleman, supra; Commonwealth v. Silverman, supra.
Smith,
¶ 10 In the instant case, the trial court asserted that Williams’s reliance upon
Smith
is misplaced, as both that case, and one of the cases that the
Smith
Court cited in its above rationale,
Silverman, supra,
were purportedly overruled by this Court’s decision in
Commonwealth v. Postell,
¶ 11 In
Posted,
the defendant was convicted of numerous crimes after he had brutally assaulted his former paramour.
Posted,
¶ 12 The defendant in Posted appealed from the judgment of sentence, arguing that the trial court had violated his double jeopardy rights in re-sentencing him. Id. at 614. Specifically, the defendant primarily relied upon Silverman in support of his claim that “the Double Jeopardy clauses protect against multiple punishments for the same offense and prohibit the sentencing court from modifying a sentence where such modification increases the sentence.” Id. The Posted Court rejected the defendant’s double jeopardy challenge and held that several cases had made clear that *1210 “Silverman is no longer the law of this Commonwealth.” Id. at 615 (noting that subsequent case law had established that “[а] defendant must have a legitimate expectation of finality prior to affording him double jeopardy protection[,]” and that “the Double Jeopardy Clause d[oes] not protect [a defendant] from modification of his sentence where such modification is accomplished within the statutorily proscribеd time period allotted for appeal of his sentence, since there can be no expectation of finality during the appeal peri-odAdditionally, the Postell Court cited to Smith, in a footnote, observing that the panel in Smith
cited to Commonwealth v. Silverman [ ] for the proposition that a modification increasing the sentence imposed on a criminal defendant constitutes double jeoрardy. We believe that the Pennsylvania Supreme Court has overruled the reasoning it employed in Silverman.
Id. at 615 n. 3.
¶ 13 Here, it is undisputed that Silver-man has been overruled. However, we determine that Smith remains valid, controlling precedent with regard to the issue presented herein. The trial court in Pos-tell — unlike that in Smith and in the instant case — upwardly modified the defendant’s original prison sentence in response to a timely motion for reconsideration of sentence. In this case, the trial court re-sentenced Williams on two convictions on which he had originally received guilt-without-punishment sentences approximately two years earlier. We agree with the Commonwealth’s argument that
the Smith Court’s rationale was somewhat broader than the Silverman double jeopardy analysis and, when considered under the “finality” analysis outlined by the Postell Court, appears to retain its viability. The “final” sentence in Smith — and here — was the “no further penalty” sentence that was not challenged by either party in a motion to modify or an appeal. As to [the NFP Sentences, it is reasonable to conclude that [Williams] had an expectation of finality — one thаt would not have existed with respect to the probationary sentences which, by their very nature, remain subject to modification throughout their term.
Brief for the Commonwealth at 13. Moreover, even assuming that the discussion in
Smith
regarding double jeopardy is no longer valid authority,
Smith
remains authoritative for the proposition that a probation revocation court dоes not have the authority to re-sentence an offender on a final guilt-without-punishment sentence after the period for altering or modifying the sentence has expired.
See Smith,
¶ 14 Based upon the foregoing, we reverse Williams’s judgment of sentence imposed as to the Contested Sentences (more specifically, the convictions at Case No. 3327-2005 — count 3 (corruption of minors), and Case No. 3329-2005 — count 2 (indecent assault)).
¶ 15 Since we have reversed the aforementioned convictions, we may have altered the trial court’s sentencing scheme.
See Commonwealth v. Dobbs,
¶ 16 Judgment of sentence reversed in part and vacated in part; case remanded for further proceedings consistent with this Opinion; jurisdiction relinquished.
Notes
. 18 Pa.C.S.A. §§ 3121(c), 4304(a).
. 18 Pa.C.S.A. §§ 3126(a)(7), 6301(a).
. Williams was paroled immediately based on time served. As a condition of Williams’s probation, the trial court ordered that he not have contact with either of the victims and that he register with the Pennsylvania State Police as a sex offender.
.Specifically, Williams had failed to register as a sex offender, was convicted of this crime by a separate trial court judge, and was thereafter convicted of another offensе after his release from jail. Williams also purportedly had violated the “no-contact” order by having contact with his step-daughter.
. The trial court judge based her revocation determination, in part, on Notes of Testimony from an unrelated contempt hearing in the Mercer County Court of Common Pleas regаrding a custody battle over Williams's stepdaughter. At this hearing, the presiding judge credited witness testimony that Williams had had unrestricted contact with his step-daughter. Williams was not present at this hearing and was not a party to the case,
. As Williams correctly pointed out in his Motion, a trial court has an inherent authority to correct a patently illegal sentence even after an appeal from the sentence has been filed.
See Commonwealth v. Holmes/Whitfield,
. Williams does not dispute the legality of his remaining two probation violation sentences.
. We have also reviewed the case law cited by the trial court judge in her later, April 28, 2009 Opinion, and determine that it does not compel a different result.
. In the interest of judicial economy, the trial court may wish to address Williams's remaining claims on remand.